| "And the harvest is done" : life on the land in Offaly and Tipperary | | Monograph or Collective Volume | Geography Publications | 1990 |
| "Lords of ether and of light" : the Irish astronomical tradition of the nineteenth century | Whyte, Nicholas | Article in Journal | | 1995 |
| ''Bronze age bling' Wessex gold in an Offaly burial | Lalonde, SusanTroy, Carmelita | Article in Journal | | 2011 |
| 'A house of middle size' | Somerville-Large, Peter | Article in Journal | | 2014 |
| 'A mere boy' | McCabe, Fergal | Article in Journal | | 2016 |
| 'A permanent house for local archives' : a case study of a community's archives in County Offaly | Shortall, Lisa Collins | Article in Journal | | 2016 |
| 'But what exactly did she give?' Derbforgaill and the Nuns' Church at Clonmacnoise | Ní Ghrádaigh, Jenifer | Article in Book | Wordwell | 2003 |
| 'Dr Otto Boeddicker, astronomer (1853-1937) : a German family settled in Birr and 'casualties' of the First World War | Shortall, Lisa | Article in Book | Esker Press | 2018 |
| 'Good fences make good neighbours': fabricated crime and religious tension in pre-Famine King's County | Hartigan, Robert | Article in Journal | | 2015 |
| 'Members of the republick of letters': Maria Edgeworth, literary sociability and intellectual pursuits in the Irish midlands | Prendergast, Amy | Article in Journal | | 2016 |
| 'Monstrum horrendum'. A newly discovered poem from county Offaly in the 1641 Rebellion | Maxwell, Jane | Article in Journal | | 2019 |
| 'That bloody duke' and Bernard Shaw : a visitor to Birr during the Great War | Byrne, Michael | Article in Book | Esker Press | 2018 |
| 'The fall and hopeful rise of Tullamore town centre' | MacCabe, Fergal | Article in Journal | | 2013 |
| 'The gallant old legion': Cumann na mBan in County Offaly, 1915-1922 | Molloy, Ciara | Article in Journal | | 2016 |
| 'The undone years' An account of the Hackett siblings from Clonmel who laid down their lives for the Great War effort | McDermott, Alice | Article in Journal | | 2014 |
| 'The years are passing overhead and passing awful quick': 150th commemorations for Erin go Bragh arrival at Moreton Bay | Harrison, Jennifer | Article in Journal | | 2013 |
| 'They kept the home fires burning' : the story of turf production on the Kildare-Offaly bogs in the 1940s-1950s | Gill-Cummins, Maureen | Article in Journal | | 2003 |
| 'Uncovering William Morris' : designs for Charleville Castle, Tullamore | Burke, Emma | Article in Journal | | 2013 |
| 'When the revolution comes'. Stephen McNeill, President of the Offaly Historical and Archaeological Society, 2000-2016 | | Article in Journal | | 2016 |
| 100 years of Clara History , a Goodbody family perspective Offaly history | Goodbody, J. HaroldGoodbody, Michael | Monograph or Collective Volume | Esker Press | 2021 |
| 1798 and 1803 rebellions | Bulfin Winder, Jeanne | Article in Book | | 2003 |
| 1916 and the politics of the 'Midland Tribune' and 'Tullamore and King's County Independent' | Byrne, Michael | Article in Journal | | 2016 |
| 1916 Canal breach at Edenderry | | Article in Journal | | 2016 |
| 1950s Tullamore revisited | Kenny, Joe | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| A Ballyduff boy in the new world: my grandfather, Tom Daly | Rovinsky, Robert | Article in Journal | | 2013 |
| A Birr official in Dublin: experiences of the fighting of Easter Week, 1916 (from the 'Midland Tribune', 13 May 1916 | Byrne, Michael | Article in Journal | | 2016 |
| A brief history of Daingean reformatory and its former uses | Kearney, John | Article in Journal | | 2005 |
| A case study of a midland settlement in west Offaly, Clonona village c.1800-1860. Parts I-II | Murphy, Gerard | Article in Journal | | 2006 |
| A Clonmacnois workshop in stone | Hicks, C. | Article in Journal | | 1981 |
| A compact history of Birr | Deery, Oisín | Monograph or Collective Volume | Tama | 2001 |
| A decorated and ogham-inscribed beater from Leabeg | Moore, FionnbarrSikora, Maeve | Article in Journal | | 2020 |
| A disaffected class: King's County farm labourers in the early 1880s | Lane, Padraig | Article in Journal | | 2015 |
| A famous country theatre | Farrell, Michael | Article in Journal | | 1940 |
| A grave-slab associated with the high cross at Durrow | De Paor, Liam | Article in Book | | 1998 |
| A gross violation of the public peace : the Tullamore incident 1806 | Gray, D. S. | Article in Journal | | 1976 |
| A gross violation of the public peace : the Tullamore incident, 1806 | Grey, Daniel S. | Article in Journal | | 1976 |
| A group of shafts and related sculpture from Clonmacnoise and its environs | Edwards, Nancy | Article in Book | | 1998 |
| A history of Gallen Priory, Ferbane : from the time of St. Cynoc to the present day | Barber, Marie ThérèseDelaney, M. | Monograph or Collective Volume | Sisters of St. Joseph of Cluny | 2005 |
| A history of Portarlington Generating Station and Clonsast bog development | Mullins, Richard J. | Monograph or Collective Volume | Richard J. Mullins | 1993 |
| A history of primary education in west Offaly, 1800-2010 | Ryan, Brendan, 1933- | Monograph or Collective Volume | Offaly Historical and Archaeological Society | 2012 |
| A history of the Cloghan parish | | Monograph or Collective Volume | Cloghan History Group, I.C.A. | 1988 |
| A history of Walsh Island & surrounding townlands | O'Rourke, Michael | Monograph or Collective Volume | [The author] | 2018 |
| A hospital in Tullamore | Hume, John | Article in Journal | | 2008 |
| A land by the river of God : a history of Ferbane parish : from earliest times to c.1900 | Ryan, Brendan | Monograph or Collective Volume | St. Mel's Diocesan Trust | 1994 |
| A list of Offaly cemeteries | Kearney, JohnKincaid, Maureen | Article in Journal | | 2006 |
| A look back into the past as Tullamore Town Clerk, 1970–72 | Taaffe, Jack | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| A man of invention : John Joly (1857-1933), engineer, physicist and geologist | Wyse Jackson, Patrick N. | Article in Book | | 1992 |
| A memoir of Captain Kenneth Howard R.A. | Keaney, Marian | Article in Journal | | 2005 |
| A microscopic look at Mary Ward : gender, science and religion in nineteenth-century Ireland | Agnew, Éadaoin | Article in Book | | 2011 |
| A military poet in Birr | Ó Casaide, Séamus | Article in Journal | | 1940 |
| A note on the Tullamore town improvements 1860 : addendum | O'Neill, Tim | Article in Journal | | 2008 |
| A note on the Tullamore town improvements, 1860 | O'Neill, Timothy P. | Article in Journal | | 2006 |
| A note on Tullamore by a frequent visitor from South Africa | Cronin, Patrick | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| A Palatine childhood | Hinchy, F. S. | Article in Journal | | 1993 |
| A panel on the North Cross at Clonmacnoise | Bourke, Cormac | Article in Journal | | 1986 |
| A pilgrim people : stories from Leamonaghan | | Monograph or Collective Volume | Leamonaghan Parish Millennium Committee | 2000 |
| A planter's interaction with Gaelic culture : Sir Matthew de Renzy, 1577-1634 | Mac Cuarta, Brian | Article in Journal | | 1993 |
| A Poitín affray near Ballyboy in 1797 | Barron, T. J. | Article in Journal | | 1974 |
| A quiet pursuit... a personal look back at Keith Lamb and his Woodfield Garden | Nelson, E. Charles | Article in Journal | | 2012 |
| A ramble in old Banagher | Hasson, Seamus | Article in Journal | | 1978 |
| A register of trees, King's County, 1793-1913 | McCracken, Eileen | Article in Journal | | 1973 |
| A scribe in Cowen's country | McSweeney, Declan | Monograph or Collective Volume | [Declan McSweeney] | 2008 |
| A select bibliography of county Offaly history | Byrne, Michael | Article in Book | | 1998 |
| A study of the United Irish League in the King's County, 1899-1918 | McEvoy, John Noel | Thesis | | 1992 |
| A tale of two Kerry men drinking after hours in Hayes's Hotel, Tullamorer in 1916 | Byrne, Michael | Article in Journal | | 2016 |
| A trek through the bogs | O'Carroll, EllenWhitaker, Jane | Article in Journal | | 1999 |
| A Tullamore schoolboy’s diary of episodes in the years of the War of Independence and Civil War : a diary by Patrick Wrafter, Church Street, Tullamore. (edited by Michael Byrne) | Wrafter, Patrick | Article in Journal | | 2020 |
| A variety of perspectives on Laurence Parsons, 2nd earl of Rosse | Malcomson, A. P. W. | Article in Book | NA | 1998 |
| A walk through Tullamore | Byrne, Michael | Monograph or Collective Volume | Esker Press | 1980 |
| A world renowned Ferbane scientist: the Hon. Mary Ward (née King), 1827-69 | Ryan, Brendan | Article in Journal | | 2013 |
| Acculturation in the Irish midland plantations of the seventeenth century : an archaeological perspective | Lyttleton, James | Article in Book | | 2009 |
| Adomnán at Birr, AD 697 : essays in commemoration of the law of the innocents | O'Loughlin, Thomas | Monograph or Collective Volume | Four Courts | 2001 |
| Agha Church : architectural iconography and building ambiguities | Ní Ghrádaigh, Jenifer | Article in Book | | 2008 |
| Áine Ní Riain, 25 Upper Gardiner Street, Cumann na mBan, Tullamore, 1915. | Ní Riain, Áine | Article in Book | | 2016 |
| Alice Stopford Green, Otway Toler and Durrow in 1914 | Byrne, Michael | Article in Book | | 1994 |
| All the King's men. The late nineteenth-century Orange revival in King's County (Offaly) | Dougan, Quincey | Article in Journal | | 2019 |
| All the King’s men [The late nineteenth-century Orange revival in King’s County (Offaly)] | Dougan, Quincey | Article in Journal | | 2019 |
| Amber in prehistoric Ireland | Moloney, Lisa | Article in Journal | | 2013 |
| An addition to the corpus or bronze open work plaques emanating from a Clonmacnose workshop in the twelfth century | Rice, Gerard | Article in Journal | | 1990 |
| An ancient Irish bridge (Clonmacnoise) | Duke, Seán | Article in Journal | | 1996 |
| An early Elizabethan treatise on Laois and Offaly: Cormac mac Briain Í Chonchubhair's 'Device for the Government of Ireland' (c.1565) | Heffernan, David | Article in Journal | | 2015 |
| An early nineteenth century forger's run from the Co. Offaly | Dolley, Michael | Article in Journal | | 1975 |
| An Elizabethan map of Leix and Offaly : cartography, topography and architecture | Andrews, J. H. (John Harwood)Loeber, Rolf | Article in Book | | 1998 |
| An Elizabethan McCabe? | McCabe, Brian
| Article in Journal | | 2022 |
| An eviction in Kinnitty: Republican social agitation and the new Fianna Fáil government, 1932-1933 | O'Neill, Timothy | Article in Journal | | 2014 |
| An introduction to sources for the study of landed estates in King's County (Offaly) | Reilly, Ciarán | Article in Journal | | 2015 |
| An introduction to the architectural heritage of County Offaly | Ireland. Department of the Environment, Heritage and Local GovernmentNational Inventory of Architectural Heritage | Monograph or Collective Volume | The Stationery Office for Dept. of the Environment, Heritage and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2006 |
| An Ogham stone find from Clonmacnoise | Manning, ConlethMoore, Fionnbarr | Article in Journal | | 1991 |
| An Ogham-inscribed antler handle from Clonmacnoise | King, Heather | Article in Journal | | 2008 |
| An overview of sport in Tullamore: the 1960s | Corrigan, Kevin | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| An overview of the development of the Health Services in Offaly and the midlands since the 1960s | Doherty, Denis | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| An unpublished Irish hoard of 'St. Peter' pence | Dolley, Michael | Article in Journal | | 1958 |
| An unrecorded seventeenth-century Clonmacnoise chalice | Manning, ConlethÓ Háinle, Cathal G., | Article in Book | | 2003 |
| Ancient funeral route to Clonmacnoise, retraced by Drum Heritage Group | Egan, Edward | Article in Journal | | 1996 |
| Anglican church architecture in seventeenth-century Offaly | Lyttleton, James | Article in Journal | | 2008 |
| Animals and sacred bodies in early medieval Ireland : religion and urbanism at Clonmacnoise | Soderberg, John | Monograph or Collective Volume | Lexington Books | 2022 |
| Annual Report on Offaly History for 2018–2019 | Byrne, Michael | Article in Journal | | 2020 |
| Another deade of centenaries, 1913-23: The Biddulphs, the Great War and the decline of the big house in King's County/Offaly | Byrne, Michael | Article in Journal | | 2016 |
| Anthony Mageoghegan, bishop of Clonmacnois | Walsh, Paul, Revd, 1885-1941 | Article in Journal | | 1940 |
| Appendix : chronological catalogue of the works of Anthony Chearnley c.1715-c.1786 | Harbison, Peter | Article in Book | | 2005 |
| Approach the fountain : a history of Seir Kieran | Irish Countywomen's Association, Seir Kieran Guild | Monograph or Collective Volume | Seir Kieran I.C.A. | 1992 |
| Archaeological inventory of County Offaly | | Monograph or Collective Volume | The Stationery Office | 1997 |
| Architecture in Offaly | Sheehy, Margaret | Article in Journal | | 1965 |
| Archives report 2015/2016 | Shortall, Lisa | Article in Journal | | 2016 |
| Armstrongs : from the debatable lands of Scotland to the 1798 rising in Ireland | Devine, Joseph | Article in Journal | | 2003 |
| Around an inscription : the cross of the scriptures at Clonmacnois | Henry, Françoise, 1902-1982 | Article in Journal | | 1981 |
| Aspects of social and sporting times in Durrow | Bracken, Helen | Article in Book | | 1994 |
| At the foot of slieve Bloom : history and folklore of Cadamstown | Heaney, Paddy | Monograph or Collective Volume | Kilcormac Historical Society | 2001 |
| At the Sign of the Cat and Bagpipes | Donnelly, Séan | Article in Journal | | 2005 |
| Babylon to Banagher | Nowell, Alan | Article in Journal | | 2012 |
| Ballinderry Crannóg no.2, Co. Offaly : the later bronze age | Newman, Conor | Article in Journal | | 2002 |
| Balllinamere GAA club in the early years | Dalton, Michael | Article in Book | | 2015 |
| Ballybryan...a step back in time | Darby, Stephen | Monograph or Collective Volume | Stephen Darby | 1995 |
| Ballycowan Castle | Cummins, PatsyDalton, Michael | Article in Book | | 2015 |
| Ballycumber men and women and the Great war | Larkin, Eamonn | Article in Book | | 2018 |
| Ballycumber Railway Station, 1862-1963 | Sweeney, Paschal | Article in Journal | | 2015 |
| Ballykilmurray Race Course and Golf Club | Dalton, Michael | Article in Book | | 2015 |
| Ballyskenagh | Walsh, Laurence | Article in Journal | | 2003 |
| Banagher man Kieran Kenny in Distillery Battle | Burke, J.F.Oakley, G.V. | Article in Journal | | 2016 |
| Banagher on the Shannon : a historical guide to the town | Trodd, Valentine | Monograph or Collective Volume | The author | 1985 |
| Banagher Royal School | Quane, Michael | Article in Journal | | 1967 |
| Banking and Insurance in Tullamore since the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Banking for the future : the national museum of Ireland bog body tissue samples bank | Mulhall, Isabella | Article in Journal | | 2019 |
| Beathaí Chiarán Chluain Mhac Nóis : a gcoibhneas dá chéile agus a mbunús | Mac Donncha, Frederic | Article in Journal | | 1952 |
| Birr and the law of the innocents | Ní Dhonnchadha, Máirín | Article in Book | | 2001 |
| Birr Castle and the Parsons family in the first half of the seventeenth century | Rosse, Alison | Article in Journal | | 2011 |
| Birr military cemetery : a history of the cemetery and those interred there | Callaghan, Stephen | Monograph or Collective Volume | Offaly County Council, Heritage Office | 2020 |
| Birr the monastic city, St. Brendan of the Water Cress | Carville, Geraldine | Monograph or Collective Volume | Kestrel Books | 1997 |
| Birr, Co. Offaly : its history and its records | Hood, Susan | Article in Journal | | 1995 |
| Birr, Convent of Mercy. Convent centenary | Anonymous | Article in Journal | | 1940 |
| Blood, Cage & Gore: violence, famine and excess from the Irish midlands to the American West and colonial Australia | Doyle, Aidan | Monograph or Collective Volume | Brosna Press | 2021 |
| Brian Cowen : the path to power | O'Toole, Jason | Monograph or Collective Volume | Transworld Ireland | 2009 |
| Bulfin : a Derrinlough family | Bulfin Winder, Jeanne | Article in Book | | 2003 |
| Bully’s Acre – A history of Birr’s forgotten cemetery | Callaghan, Stephen | Monograph or Collective Volume | Offaly County Council | 2024 |
| Burials and high crosses at Clonmacnoise | King, Heather | Article in Book | | 1997 |
| Business and professional women 50 years in Tullamore 1971 – 2021 | | Monograph or Collective Volume | Print Plus | 2021 |
| Butler blood flows freely: the famous and not so famous descendants of the Chief Butlers of Ireland | Foster, Craig L. | Article in Journal | | 2016 |
| Cáin Adamnáin | Ó Fiannachta, Pádraig | Article in Book | | 1982 |
| Cappawhite and Doon | Fitzgerald, Seamus | Monograph or Collective Volume | Salesian P. | 1983 |
| Castles and fortification of county Offaly c.1500-1815 | Kerrigan, Paul M. | Article in Book | | 1998 |
| Change in Tullamore Catholic Parish since the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Changes in Clara’s ‘big house’ ownership following Irish independence : the case of Inchmore and Drayton Villa | Goodbody, Michael | Article in Journal | | 2020 |
| Charles Parsons | Ireland, John de Courcy, 1911-2006 | Article in Journal | | 1949 |
| Chearnley and his contexts : family, neighbours and gardens | Barnard, T. C. (Toby Christopher) | Article in Book | | 2005 |
| Cholera in Offaly in the 1830s | O'Neill, Timothy P. | Article in Journal | | 2003 |
| Church of Assumption, Tullamore | Broderick, BrídByrne, Michael | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 2006 |
| Clara : a midland industrial town, 1900-1923 | Quinn, D. B. (David Beers) | Article in Book | | 1998 |
| Clara : a pictorial record | Kinahan, Raphael | Monograph or Collective Volume | Esker Press | 1992 |
| Clara and the war | Byrne, Michael | Article in Book | Esker Press | 2018 |
| Clara to Banagher | O'Dea, J. P. | Article in Journal | | 1974 |
| Clara, Co. Offaly in the pre-war years | McCarthy, Michael | Article in Book | Esker Press | 2018 |
| Clare to Banagher | O'Dea, J. P. | Article in Journal | | 1973 |
| Clashganny MIll | O'Reilly, Conor | Article in Journal | | 2009 |
| Clonmacnois | Ryan, J. | Article in Journal | | 1939 |
| Clonmacnois - the church and lands of St. Ciarán : change and continuity in an Irish monastic foundation (6th to 16th century) | Kehnel, Annette | Monograph or Collective Volume | Lit | 1997 |
| Clonmacnois and the 12th century synods | Ó Maoleachlainn, Pádraig I. | Article in Journal | | 1974 |
| Clonmacnois as a diocese | MacNamee, James Joseph | Article in Journal | | 1945 |
| Clonmacnois by Beranger, 1779 | | Article in Journal | | 1973 |
| Clonmacnoise | Manning, Conleth | Monograph or Collective Volume | The Stationery Office | 1994 |
| Clonmacnoise - when experts meet ..... | Ó Ríordain, Dúlra | Article in Journal | | 1998 |
| Clonmacnoise : a historical summary | Ryan, John | Monograph or Collective Volume | The Stationery Office | 1976 |
| Clonmacnoise : art and patronage in the early medieval period | Ó Floinn, Raghnall | Article in Book | | 1995 |
| Clonmacnoise castle | Manning, ConlethO'Conor, Kieran, | Article in Book | | 2003 |
| Clonmacnoise cathedral - the oldest church in Ireland? | Manning, Conleth | Article in Journal | | 1995 |
| Clonmacnoise studies, vol. 1 : Seminar papers 1994 | | Monograph or Collective Volume | Dúchas, the Heritage Service | 1998 |
| Clonmacnoise, Co. Offaly | Manning, Conleth | Monograph or Collective Volume | Dúchas, the Heritage Service | 1998 |
| Collecting oral history in county Offaly | O'Keeffe, JaneO'Keeffe, Maurice | Article in Journal | | 2013 |
| Colonel Gray : pioneer of the west | O'Connor, Richard C. | Article in Journal | | 1911 |
| Conntae an Ríogh : King's County | Fear Ceall, pseud. | Article in Journal | | 1958 |
| Conntae an Ríogh; King's county | Clarke, T. P. | Article in Journal | | 1947 |
| Constructing Colum Cille | Lacey, Brian | Article in Journal | | 2004 |
| Context and chronology of carved stone at Clonfinlough, county Offaly | Twohig, Elizabeth Shee | Article in Journal | | 2002 |
| Coolacrease - a place with a tragic history | Heaney, Paddy | Article in Journal | | 2006 |
| Coolacrease : the true story of the Pearson executions - an incident in the Irish War of Independence | | Monograph or Collective Volume | Aubane Historical Society | 2008 |
| Cornelius Heeney | Bennett, William Harper | Article in Journal | | 1918 |
| Cosáin thar thírdhreach na hEorpa ; Cosáin thar thírdhreach chultúrtha na hEorpa, 2000-2003rp | | Monograph or Collective Volume | Cosáin | 2003 |
| County Offaly: the scene in 1909, 100 years ago | Byrne, Michael | Article in Journal | | 2011 |
| County Tipperary & Offaly (Birr Division) Sessional Bar Association | Carrigan, John | Monograph or Collective Volume | Tipperary Solicitors Bar Association | 2003 |
| Croghan, County Offaly, Ireland | Feehan, John | Monograph or Collective Volume | Offaly County Council in association with UCD School of Agriculture and Food Science | 2011 |
| Crowd-control in sixth-century Clonmacnoise (Adomnán, VC 1.3) | Woods, David | Article in Journal | | 2010 |
| Crucifixion plaques | Kelly, Dorothy | Article in Journal | | 1990 |
| Cumann na mBan in Offaly | Molloy, Ciara | Article in Journal | | 2020 |
| Daingean : pages from the past | Kearney, John | Monograph or Collective Volume | Offaly Historical Society | 1988 |
| Dan Edwards : the life and times of a craftsman and artist | Ryan, Declan | Monograph or Collective Volume | Offaly County Council | 2016 |
| Dancing Days in Tullamore since the 1960s: From the marquee to the nightclub | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Daniel Hoey | | Article in Journal | | 2016 |
| Death customs in rural Ireland : traditional funerary rites in the Irish midlands | Ridge, Anne | Monograph or Collective Volume | Arlen House | 2009 |
| Decline of the non-Catholic population of Lemangahan | McNeill, Stephen | Article in Journal | | 2005 |
| Dempseys together [and]The 2016 O'Dempsey Clan gathering | Dempsey, JamesGoode, P.J. | Article in Journal | | 2016 |
| Denis Geraghty of Ballycumber, County Offaly, killed in action in WWI | Sweeney, Paschal | Article in Book | Esker Press | 2018 |
| Denis Joseph O'Regan (1874-1941) | O'Regan, Redmond | Article in Journal | | 2018 |
| Derbforgaill: twelfth-century abductee, patron and wife | Ó Hoireabhárd, Seán | Article in Journal | | 2022 |
| Derrinlough - a timeline | Bulfin Winder, Jeanne | Article in Book | | 2003 |
| Devenir irlandés : narrativas íntimas de la emigración irlandesa a la Argentina (1844-1912) | | Monograph or Collective Volume | EUDEBA | 2004 |
| Disbandment, destruction and commemoration. The Leinster Regiment, their depot and how they were commemorated in Birr, Co. Offaly | Callaghan, Stephen | Article in Journal | | 2022 |
| Dooley : a family memoir | O'Brien, Kevin | Monograph or Collective Volume | Hero Books | 2022 |
| Dorothy Parsons of Birr : writing, networks, identity, 1640–1670 | Clarke, Danielle | Article in Journal | | 2022 |
| Drama in Birr : Oxmantown Hall, 1889 to 1916 | Hogan, Margaret | Monograph or Collective Volume | [Birr Historical Society] | 2016 |
| Dunkerrin : a parish in Ely O'Carroll | Ó Riain, Seamus | Monograph or Collective Volume | Dunkerrin History Committee | 1988 |
| Durrow : monasterium nobile | Harbison, Peter | Article in Journal | | 2005 |
| Durrow and Saint Columcille | Byrne, Michael | Article in Book | | 1994 |
| Durrow pattern | Geoghegan, FredWalsh, Gerald | Article in Book | | 1994 |
| Durrow's beauty | Simms, George Otto | Article in Journal | | 1979 |
| Eamonn Bulfin of Derrinlough | Pey, Brian | Article in Journal | | 2016 |
| Early Aviation in Offaly | Warner, Guy | Article in Book | Esker Press | 2018 |
| Early Christian settlement, society and economy | Stout, Matthew | Article in Book | | 1998 |
| Economic development in Offaly's towns and villages in the eighteenth century and the Vallancey Survey of 1771 | Byrne, Michael | Article in Journal | | 2006 |
| Edenderry 1916 and the revolutionary era | Reilly, Ciarán | Monograph or Collective Volume | Edenderry Historical Society | 2016 |
| Edenderry : a Leinster town | Murphy, Michael | Monograph or Collective Volume | Offaly County Council | 2004 |
| Edenderry : growth of a town 1800-1845 | Evans, Mairead | Article in Journal | | 1999 |
| Edenderry and the First World War | Reilly, Ciarán J. | Article in Journal | | 2008 |
| Edenderry, 1820-1920 : popular politics and Downshire rule | Reilly, Ciarán J. | Monograph or Collective Volume | Nonsuch Publishing | 2007 |
| Edenderry, County Offaly, and the Downshire estate, 1790-1800 | Reilly, Ciarán J. | Monograph or Collective Volume | Four Courts | 2007 |
| Education in Durrow | Bracken, Helen | Article in Book | | 1994 |
| Edward Egan. “The poet Egan” | Egan-Baker, Maryan | Article in Journal | | 1995 |
| Eglish and Drumcullen : a parish in Firceall | | Monograph or Collective Volume | Firceall Heritage Group | 2003 |
| Eglish barony | Neavyn, Philomena Cavanagh | Article in Journal | | 1999 |
| Eglish townland histories | Pey, Brian | Article in Book | | 2003 |
| Elite women and their recipe books: the case of Dorothy Parsons and her 'Booke of Choyce Receipts, all written with her owne hand in 1666' | Sexton, Regina | Article in Book | | 2018 |
| Emigrants from Offaly to Nelson | Whelan, Helen | Article in Journal | | 2007 |
| Encounters bertween people : a 'Gaelic' site at Killeisk, Co. Tipperary, and an 'Anglo-Norman' site at Busherstown, Co. Offaly. | Kiely, Jacinta.MacCotter, Paul. | Article in Book | | 2012 |
| End of an era for Durrow | Byrne, Michael | Article in Book | | 1994 |
| Esker Riada – in the beginning | Dalton, Michael | Article in Book | | 2015 |
| Excavation and conjecture of a late Bronze Age farmstead at Tober, Co. Offaly | Walsh, Fintan | Article in Journal | | 2011 |
| Excavation and conjecture of a late bronze age farmstead at Tober, County Offaly | Walsh, Fintan | Article in Journal | | 2013 |
| Excavation of an early 17th-century glassmaking site at Glasshouse, Shinrone, Co. Offaly, Ireland | Farrelly, JeanFenwick, JoeGould, MalcolmMcCann, WilliamMeenan, RoseanneO'Brien, CaiminPaynter, SarahWillmott, Hugh | Article in Journal | | 2014 |
| Excavations at Clonmacnoise | King, Heather | Article in Journal | | 1992 |
| Exploring Tullamore : an illustrated guide | Byrne, Michael | Monograph or Collective Volume | Offaly Historical and Archaeological Society | 2013 |
| Extracts from the 'Midland Tribune' Easter Supplement 1916. The story of the Fourth battalion | Doolin, Joe | Article in Journal | | 2016 |
| Extracts from the Church of Ireland parish registers of Ballyboy, King's county (Offaly), 1709-48 and 1797-1868 | Refaussé, Raymond | Article in Journal | | 1986 |
| Faith of our fathers : the Gaelic aristocracy in Co. Offaly and the counter-reformation | Lyttleton, James | Article in Book | | 2009 |
| Faithful and fearless, Major Howard Egan : early Mormonism and the pioneering of the American West | Hartley, William J. | Monograph or Collective Volume | Author | 2017 |
| Falling into wretchedness : Ferbane in the late 1830s | Sheil, Helen | Monograph or Collective Volume | Irish Academic Press | 1998 |
| Famine and folklore stories from the Rhode area as gathered for the schools manuscript commission | O'Connor, Mary | Monograph or Collective Volume | | 2023 |
| Famine, epidemic, pandemic, and political turmoil in Ireland : the life of Elizabeth Kerin née Evans, 1881 – 1967 | Turner, Sylvia | Article in Journal | | 2020 |
| Farming in Offaly down the years : a miscellany in stories and pictures | Anonymous | Monograph or Collective Volume | Offaly Historical Society | 1987 |
| Father Tim | McAuliffe, Harold J. | Monograph or Collective Volume | Bruce Publishing Co. | 1944 |
| Feeding communities : monasteries and urban development in early medieval Ireland | Soderberg, John | Article in Book | | 2001 |
| Female trouble : ambivalences and anxiety at the Nuns' church | Overbey, Karen Eileen | Article in Book | | 2008 |
| Ferbane parish and its churches | McGowan, Patrick A. | Monograph or Collective Volume | Canon P.A. McGowan | 1979 |
| Filling in the blanks : and archaeological survey of the Lemanaghan bogs | Irish Archaeological Wetland Unit | Article in Journal | | 1997 |
| Finghin Mac Carthaigh, king of Desmond, and the mystery of the second nunnery at Clonmacnoise | Manning, Conleth | Article in Book | | 2004 |
| First World War | | Article in Journal | | 2016 |
| Flights of fancy: follies, families and demesnes in Offaly | McKenna, Rachel | Monograph or Collective Volume | Offaly County Council | 2017 |
| Florentia monasteriorum | O'Brien, Caimin | Article in Journal | | 2009 |
| Forest glass furnaces in County Offaly | Farrelly, JeanO'Brien, Caimin | Article in Journal | | 1997 |
| Forgotten souls : memorials in Saint Rynagh’s old graveyard, Banagher, County Offaly | Scully, James | Monograph or Collective Volume | Author | 2020 |
| Four Offaly saints: the lives of Ciarán of Clonmacnoise, Ciarán of Seir, Colmán of Lynally and Fionán of Kinnitty | Ó Riain, Pádraig | Monograph or Collective Volume | Four Courts | 2018 |
| Fr Edward Campion 'The Practical Patriot' | Cocoman, Noel | Article in Journal | | 2024 |
| Fr John Fahy (1893-1969) : radical republican and agrarian activist | Madden, Jim | Monograph or Collective Volume | Columba | 2012 |
| Fragmentary inscriptions from the West Cross at Durrow, the South Cross at Clonmacnois, and the Cross of Kinnitty | Ó Murchadha, DomhnallÓ Murchú, Giollamuire | Article in Journal | | 1989 |
| Franciscan connections with the Diocese of Clonmacnois | Conlan, Patrick, 1940- | Article in Journal | | 2006 |
| From An Tostal to The Runners: the spirit of Tullamore in the 1950s | MacCabe, Fergal : Oakley, Geoff | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| From Anglo-Norman manor to plantation estate : an archaeological survey of monasteries county Offaly | Armstrong-Anthony, Sinéad | Article in Book | | 2005 |
| From Ballyduff toLangemarck and places in between: a report on research in progress on the Joughin family from Ballyduff, near Tullamore | Deverell, Joe | Article in Journal | | 2013 |
| From burial among the ancestors to burial among the saints: an assessment of some burial rites in Ireland from the Fifth to the Eighth centuries AD | O'Brien, Elizabeth | Article in Book | | 2016 |
| From civic guards to Garda Síochána | | Monograph or Collective Volume | # | # |
| From Clara Road to Portland Place : the exciting journey of a Tullamore architect | MacCabe, Fergal | Article in Journal | | 2020 |
| From Clonsast to Ballyburley, Joe O'Reilly and 4th class, Convent school, Edenderry | Anonymous | Monograph or Collective Volume | Joe O'Reilly | 1994 |
| From Cluny, Saone-et-Loire, Bourgogne to Ferbane, County Offaly: The story of how the community of the Sisters of St Joseph of Cluny came to set up on the banks of the Brosna | Turley, Pádraig | Article in Journal | | 2011 |
| From Gaelic lordships to English counties: the Tudor transition in Leix and Offaly, c.1547-1603 | Wheeler, Diarmuid | Thesis | | 2018 |
| From Gothic to Gothic revival : an archaeology of Leap Castle, Co. Offaly | Tierney, Andrew | Article in Book | | 2008 |
| From Kilcolgan Court to Ballindown. Tracing the lineage of Terence MacCoghlan of Kilcolgan Court through the Jacobite Oxburghs and Reys | Ryan, Brendan | Article in Journal | | 2011 |
| From King's county to 'Quinnsland' | Harrison, Jennifer | Article in Book | | 1998 |
| From King's County to Offaly : Dáil Éireann and local government during the years of the Irish revolution | Daly, Mary E. | Article in Book | | 1998 |
| From King's County to Queensland : the case of the missing 6,500 | Harrison, Jennifer | Article in Book | | 1996 |
| From Lynally to Durrow ... by boat | Moran, Bernie | Article in Journal | | 2011 |
| From Moneygall to the White House, Eneclann's Fiona Fitzsimons traces President Barack Obama's Irish ancestry back to a small village in Co. Offaly | Fitzsimons, Fiona | Article in Journal | | 2011 |
| From seven to seven in the bog | Cooney, Peter | Article in Journal | | 2001 |
| From the files of the DIB... 'Best man on the Falls Road' | Hourican, Bridget | Article in Journal | | 2010 |
| From the quiet annals of Daingean : articles on the history of a parish in North Offaly | Kearney, John | Monograph or Collective Volume | John Kearney | 2006 |
| Fulachtaí, furnaces and farmsteads. Archaeological discoveries on the Tullamore bypass | Janes, Tom | Article in Journal | | 2011 |
| Gaelic classicism in the Irish midland plantations : an archaeological reflections | Lyttleton, James | Article in Book | | 2007 |
| Gaelic placenames of the Slieve Blooms | Heaney, Paddy | Article in Journal | | 2005 |
| Gaelic reaction to plantation: the case of the O'More and O'Connor lordships of Laois and Offaly, 1570-1603 | Carey, Vincent Patrick | Thesis | | 1985 |
| Gallen cross-slab | Corlett, Christiaan | Article in Journal | | 2000 |
| Gallen priory excavations, 1934-35 | Kendrick, T. D. | Article in Journal | | 1939 |
| Game licences for Co. Offaly and Co. Galway in 1821 | Ffolliott, Rosemary | Article in Journal | | 1985 |
| Garryhinch House | D'Alton, Máirtín | Article in Journal | | 2008 |
| General Edward Hand | Maginnis, Thomas Hobbs | Article in Journal | | 1924 |
| General view ... of the King's County | Coote, Charles, Sir | Monograph or Collective Volume | | 1801 |
| Geophysical imaging in the Leamonaghan togher | Gibson, Paul J. | Article in Journal | | 2012 |
| Georg Heinrich Bacmeister (1807-1890) : a forgotten son of Tullamore | Fischer, Joachim | Article in Journal | | 2018 |
| George Kennedy: King's County Attorney and 'a rare man of a different generation' | Caldicott, David | Article in Journal | | 2015 |
| Grand jury rooms to Áras an Chontae : local government in Offaly | Coughlan, AnneDoran, GrainneMurphy, Michael | Monograph or Collective Volume | Offaly County Council | 2003 |
| Grave connections : Killafeen Cemetery and the Fetherstonhaughs | Minnock, Carthage | Article in Journal | | 2015 |
| Gravestone inscriptions | Kincaid, Maureen | Article in Book | | 2003 |
| Great War memorials in the Church of Ireland churches of County Offaly | Callaghan, Stephen | Article in Book | Esker Press | 2018 |
| Great War training trenches at Birr Barracks : a rehearsal ground for Kitchener’s new army | Callaghan, StephenMontgomery, HeatherShine, Denis | Article in Journal | | 2020 |
| Griffith Survey of Magheramore 1858. Valuation of tenements. Parish of Banagher | Anonymous | Article in Journal | | 1994 |
| Gúaire geilt | Ó hIarlaithe, Aogán | Article in Journal | | 2023 |
| Guide to further reading | Byrne, Michael | Article in Book | | 1994 |
| Haunted memories: Rex Ingram, Francis Hitchcock and World War One | Barton, Ruth | Article in Journal | | 2015 |
| Heart and soul : a history of Saint Brendan's graveyard in Birr | Callaghan, StephenO'Brien, Caimin | Monograph or Collective Volume | Offaly County Council | 2016 |
| Henry Brenan, the King's County Crown Solicitor 1916-21 | Byrne, Michael | Article in Journal | | 2016 |
| Heritage landscapes of the Irish midlands and selected itineraries | Gibson, Paul J. | Monograph or Collective Volume | Geography Publications | 2007 |
| Heritage of our land : Ballykilmurray / Ballinamere | | Monograph or Collective Volume | Print Plus | 2015 |
| High Sheriffs of the King's County, 1655-1915 | Sadlier, Thomas U. | Article in Journal | | 1917 |
| Historic fords and weirs on the River Suck | Beggan, G. | Article in Journal | | 2019 |
| Historical miscellany | Masterson, M. J. | Article in Journal | | 1937 |
| History of Motor and Farm Machinery Garages in Tullamore, 1960–2013 | Colton, Ronnie | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| History of St John's Lodge No. 321, Tullamore Ancient Tree and Accepted Masons | Lumley, G. C. | Article in Journal | | #|- |
| History of the Ely O'Carroll territory, or ancient Ormond, situated in north Tipperary and north-western King's County, Ireland | Gleeson, John | Monograph or Collective Volume | | 1915 |
| How visiting journalists saw Tullamore in the 1960s: Readings from articles by Margaret Stewart, Ian Nairn and Conor Brady | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Hugh Mahon - patriot, pressman, politician. Volume 1: patriot and pressman : the years 1857 to 1901 | Kildea, Jeff | Monograph or Collective Volume | Anchor Books Australia | 2017 |
| I met murder on the way : the story of the Pearsons of Coolacreese | Stanley, Alan | Monograph or Collective Volume | Aimhirgin | 2005 |
| In pursuit of the 'Maine' chance : the North family of Offaly and New England, 1700-1776 | McCarron, Edward T. | Article in Book | | 1998 |
| Independence | Bulfin Winder, JeanneO'Brien, MichaelPey, Brian | Article in Book | | 2003 |
| Industrial disputes and tension in 1930s Offaly. Senator Joseph Connolly and the closing of Alesburys | Reilly, Ciarán J. | Article in Journal | | 2011 |
| Ireland in the Viking Age | Doherty, Charles | Article in Journal | | 2014 |
| Ireland's earliest crozier? | O'Carroll, Ellen | Article in Journal | | 2000 |
| Ireland's oldest bridge - at Clonmacnoise | Moore, Finbarr | Article in Journal | | 1996 |
| Ireland’s oldest bridge at Clonmacnoise | Moore, Fionnbarr | Article in Journal | | 1996 |
| Irish and Australian | Moran, M.P.A. | Article in Journal | | 2008 |
| Irish country house music collections: Birr Castle, Co. Offaly | Mullaney-Dignam, Karol | Article in Journal | | 2012 |
| Irish family history : King's county 17th and 18th century wills | Reynolds, Henry | Article in Journal | | 1944 |
| Irish freedom fighter : Peadar Bracken, 1887-1961 : a biography of an Offaly revolutionary | O'Bracken, Fergus | Monograph or Collective Volume | TAF Publishing | 2009 |
| Irish Round Towers: origins and purposes | McDonnell, Hector | Article in Journal | | 2018 |
| Irish sculpture of the early tenth century and the work of the 'Muiredach Master': problems of identification and meaning | Stalley, Roger | Article in Journal | | 2014 |
| Irish subscribers to poetry published in Edinburgh in 1731: new light on readers and Presbyterians in Offaly, Tipperary and Dublin | Loeber, RolfStauthamer-Loeber, Magda | Article in Journal | | 2006 |
| Iseal Chiarain, the low place of St Ciaran, where was it situated? | Cox, Liam F. | Article in Journal | | 1969 |
| Jack Williams : son of Tullamore, an Irish artillery officer in the first world war | Fennell, Frank | Article in Journal | | 2005 |
| Jacobite Offaly, 1689-91 | Murtagh, Harman | Article in Book | | 1998 |
| Jacopo Bisagni's "Amrae Coluimb Chille" | Charles-Edwards, T.M. | Article in Journal | | 2021 |
| James 'Ginger’ Moran of Edenderry : from full-back to I.R.A leader | Reilly, Ciaran | Article in Journal | | 2020 |
| James Carlile, 1784-1854 | Rodgers, R. J. | Thesis | | |
| James Lyle Stirling mineral and medicinal water manufacturing,iImporter of wines and brandies, Athy and Tullamore | Guerin, Noel | Monograph or Collective Volume | | 2023 |
| James Thomas Jackson of Ballyoran, 1868-1938 | Cox, Ronald C. | Article in Journal | | 2013 |
| Jip-cat, pig's head, petticoats and combinations : our lives, our times in Tullamore and surrounding districts | Kenny, FeargalTullamore Active Retirement Association | Monograph or Collective Volume | Tullamore Active Retirement Association | 2002 |
| John Joly (1857-1933): an Offaly man based in Trinity College in 1916 and defending the Union | Joly, John | Article in Journal | | 2016 |
| John Killaly (1766-1832) : Irish canal engineer | Cox, Ronald C. | Article in Journal | | 2005 |
| John Plunket Joly and the Great Famine in King's County | Reilly, Ciarán J. | Monograph or Collective Volume | Four Courts Press | 2012 |
| Joseph Wrafter | Condron, Breda | Article in Journal | | 2016 |
| Judge William O'Connor Morris, 1824-1904, Gortnamona, Tullamore. 'The pamphleteering judge' | Byrne, Michael | Article in Journal | | 2008 |
| Kathleen Kingston | | Article in Journal | | 2016 |
| Kevin O'Higgins, the Tullamore realm trial and the ideas of a complex revolutionary | Egan, Richard | Article in Journal | | 2004 |
| Kilbeggan memories | McCormack, Stan | Monograph or Collective Volume | Author | 2019 |
| Kilbride church and graveyard | Dalton, Michael | Article in Book | NA | 2015 |
| Kilcormac parish : celebrating 150 years of the Church of the Nativity of the B.V.M. | Kilcormac Parish Committee | Monograph or Collective Volume | Kilcormac Parish Committee | 2018 |
| Kilcruttin’s Forgotten People | Adams, Terry | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Kilmonaghan graveyard memorial recordings | Carton, Michael | Monograph or Collective Volume | Author | 2019 |
| King's County during the Great Famine : 'poverty and plenty' | Reilly, Ciarán J. | Article in Book | | 2012 |
| King's County/ Offaly, 1914-1918 : from innovation to stagnation and ennui | Byrne, Michael | Article in Book | Esker Press | 2018 |
| Kings county in 1798 | O'Donnell, Ruán | Article in Book | | 1998 |
| Knocknaman | Lowry, Paddy | Article in Journal | | 2005 |
| La description de la région de Slieve Bloom (Irlande) dans l'hagiographie de quelques fondateurs : une clef de datation des sources? | Stalmans, Nathalie | Article in Journal | | 1998 |
| Land agents and estate management in King's County during the Great Famine, 1838-53 | Reilly, Ciarán J. | Thesis | | 2010 |
| Land war | Bulfin Winder, Jeanne | Article in Book | | 2003 |
| Landlordism in King's county in the mid-nineteenth century | Breen, Grainne C. | Article in Book | | 1998 |
| Laois and Offaly claimants : broken watches, broken dreams | Powell, John Stocks | Monograph or Collective Volume | | 2016 |
| Leap Castle : a place and its people | Freeman-Atwood, Marigold | Monograph or Collective Volume | Michael Russell | 2001 |
| Learning and literature in early medieval Clonmacnoise | Bhreathnach, Edel | Article in Book | | 2003 |
| Lebor na hUidre : from Clonmacnoise to Kilbarron | Ó hUiginn, Ruairí | Article in Book | | 2015 |
| Legal Offaly : the county courthouse at Tullamore and the legal profession in County Offaly from the 1820s to the present day | Byrne, Michael | Monograph or Collective Volume | Esker Press for Offaly Historical & Archaeological Society | 2008 |
| Leinster Express ‘big wind’ story blown off the pages by Offaly murder | Fennelly, Teddy | Monograph or Collective Volume | | 2023 |
| Leinster regiment memorial unveiled at Crinkill barracks, Birr in 2013 | Fanning, Derek | Article in Book | Esker Press | |
| Let all be done gently, tenderly with as little row as possible : conflict and control in nineteenth-century King’s County : the Digby estate and the Trenches, 1857–62 | Lee, Ian | Article in Journal | | 2021 |
| Letter to Mary - Tyrell and Donegan families of Co. Offaly | Fearon, Karys | Article in Journal | | 2012 |
| Lettice Baroness of Offaly and the siege of Geashill | Von Ow, Clemens | Monograph or Collective Volume | Author | 2019 |
| Lettice, Baroness of Offaly, and the siege of her castle of Geashill, 1642 | Fitzgerald, Frederick, Lord | Article in Journal | | 1902 |
| Life at the monastery 1200 years ago | Parkes, Hilda | Article in Book | | 1987 |
| Life in Ballinamere in the early 1940s – memories and reflections | O’Brien, Ted | Article in Book | | 2015 |
| Life in Ballinamere over the years | Fox, Rose | Article in Book | | 2015 |
| Liostaí logainmneacha Contae Uíbh Fhailí : County Offaly | Ordnance Survey of Ireland, Place Names Branch | Monograph or Collective Volume | Oifig an tSoláthair | 1994 |
| Liss na Callighi | Price, Liam | Article in Journal | | 1965 |
| List of historical sites | Dalton, Michael | Article in Book | | 2015 |
| Living under thatch : vernacular architecture in Co. Offaly | O'Reilly, Barry | Monograph or Collective Volume | Mercier Press | 2004 |
| Local and lending : the story of Tullamore Credit Union 1963-2013 | Byrne, Michael | Monograph or Collective Volume | Esker Press | 2015 |
| Lois, countess of Rosse and Birr castle prisoner of war relief scheme, 1915-16 | Shortall, Lisa | Article in Book | Esker Press | |
| Lost and found - one glasshouse | Farrelly, Jean | Article in Book | | 2003 |
| Lost and found : the eleventh figure on St Manchan's Shrine | Murray, Griffin | Article in Journal | | 2003 |
| Lost lives : men from Ferbane and Belmont who died in the Great War, 1914-18 | Dooley, P. J. | Article in Book | Esker Press | |
| Love's old sweet song : James Lynam Molloy, Cornalaur, Co. Offaly | Moore, Desmond F. | Monograph or Collective Volume | Esker Press | 1997 |
| Macalla as Cluain-mhac-Noís, A.D. 1050 | Ní Mhaol-Chróin, Caitlín | Article in Journal | | 1954 |
| Magistrates, police & the downright unruly, social relations in west Offaly: Rockite 'muscle for hire' 1834-38 | Murphy, Gerard W. | Article in Journal | | 2008 |
| Mainistir le Canonaigh Agaistineacha | Ó Murthuile, Seosamh | Article in Journal | | 1961 |
| Manliffe or Manly: a King's County Quaker family at odds with its religion | Goodbody, Michael | Article in Journal | | 2015 |
| Mapping Offaly in the early nineteenth century : with an atlas of William Larkin's map of King's County, 1809 | Horner, Arnold | Monograph or Collective Volume | Wordwell in association with Offaly Historical and Archaeological Society and Offaly County Council | 2006 |
| Mary Mandeville, 'A narrative of my husband's treatment at Tullamore, as stated by to him to me on his return' | Geary, Laurence M. | Article in Journal | | 1988 |
| Matthew de Renzy's letters on Irish affairs, 1613-1620 | Mac Cuarta, Brian | Article in Journal | | 1987 |
| Maynooth to Edenderry railway | Cullen, S.O'Leary, D. | Article in Journal | | 1995 |
| Medieval peatland dwellings | Moore, CathyStanley, Michael, 1973- | Article in Journal | | 2004 |
| Megalithic tombs near Athlone. Past, present and spurious | English, Norman William | Article in Journal | | 1969 |
| Memoir of a royal artillery officer | Howard, Kenneth W. H.Keaney, Marian | Article in Journal | | 2005 |
| Memories are made of this : Jackie Finlay on social life in Tullamore since the 1950s, political intrigue and the music scene in Ireland | Finlay, Jackie | Monograph or Collective Volume | Dillonite Press | 2017 |
| Memories of Emill in the 1920s | Dunne, Pat | Article in Journal | | 2001 |
| Memories of Paddy O’Brien | O’Brien, Paddy | Article in Book | NA | 2015 |
| Merchants, medics, and the military commerce and architecture : a social history of Ireland from 1875 to 1925, as seen through the lives of some Tullamore families | Egan, Maurice G. | Monograph or Collective Volume | Esker Press | 2021 |
| Merovingian politics and insular calligraphy : the historical background to the Book of Durrow and related manuscripts | Ó Cróinín, Dáibhí | Article in Book | | 1987 |
| Michael Foley | | Article in Journal | | 2016 |
| Midlanders : chronicle of a midland parish | Trodd, Valentine | Monograph or Collective Volume | Scéal Publications | 1994 |
| Minding the Geashill Cauldron, 1859–1955 | Shortall, Lisa | Article in Journal | | 2020 |
| Miscelanea Structura Curiosa | Chearnley, Samuel | Monograph or Collective Volume | Churchhill House Press | 2005 |
| Miscelanea structura curiosa | Casey, Christine | Article in Journal | | 1990 |
| Miscelanea structura curiosa : the cross-currencies of Vitruvius Hibernicus | Paca, Barbara | Article in Journal | | 1996 |
| Miscelanea Structura Curiosa : the cross-currencies of Vitruvius Hibernicus | Paca, Barbara | Article in Journal | | 1996 |
| Miscelenea structura curiosa : the cross currents of Vitruvius Hibernicus | Paca, Barbara | Article in Journal | | 1996 |
| Miscellanea : flat disc rotary quern fragment from Church Hill, Co. Offaly | Mount, Charles | Article in Journal | | 2002 |
| Missing persons : Edenderry under the Blundells and the Downshires 1707-1922 | Maguire, W. A. (William Alexander) | Article in Book | | 1998 |
| Monsignor Patrick J. Hamell, a profile | Doran, Liam | Article in Journal | | 1996 |
| Morrow's Mill, Cadamstown. The story of a surviving mill | Heaney, Paddy | Article in Journal | | 2004 |
| Mucklagh veteran of the Battle of Ashbourne | Burke, J.F.Kelly, Seamus | Article in Journal | | 2016 |
| Mucklagh's Seamus (Jimmy) Kelly | Condron, Breda | Article in Journal | | 2016 |
| Mulock family history | Devine, Joseph | Article in Journal | | 2004 |
| My Irish convict. From a convict in County Offaly to farmer’s wife in Windsor, N.S.W., Australia | Valentine, Pam | Article in Journal | | 1996 |
| My schooldays in Ballykilmurray | Dunne, Carmel | Article in Book | | 2015 |
| New dates for old butter | Sikora, MaeveSynnott, Chris | Article in Journal | | 2018 |
| New finds from Co. Offaly | O'Brien, Caimin | Article in Journal | | 1994 |
| New light on the artistic and personal aspects of the second version of "The last circuit of the pilgrims at Clonmacnoise" by George Petrie | MacEvansoneya, Philip | Article in Journal | | 2009 |
| New publications and articles on Offaly history in 2013-14 | Byrne, Michael | Article in Journal | | 2015 |
| Notes & queries : the Franciscan friar John Colgan's Offaly roots | Colgan, John F. | Article in Journal | | 2011 |
| Notes on the collection of Irish antiquities lately at Edenderry | O'Leary, Edward | Article in Journal | | 1902 |
| Notes on the parish of Geashill and Killeigh | Palmer, A. Kingsmill | Monograph or Collective Volume | Leinster Leader (printer) | 1964 |
| Notes. George Henry Chandler (1886-1918), Canadian Expeditionary Force | Thompson, F. Glenn | Article in Journal | | 2014 |
| O'Dempseys in Offaly, some references in an Elizabethan document | Goode, P.J. | Article in Journal | | 2006 |
| Obituary. Bill Jaffray, champion of the Irish Mist Liqueur Company and of Tullamore | Byrne, Michael | Article in Journal | | 2013 |
| Obituary. Paddy Lowry of Forelacka, Kinnitty (1919-2013) | Pedlow, Amanda | Article in Journal | | 2013 |
| Obituary. Richard Glascott Symes, M.A. | C., R.
| Article in Journal | | 1906 |
| Obituary. The late Paddy Lowry, Kinnitty. An appreciation | Heaney, Paddy | Article in Journal | | 2013 |
| Observations on the Book of Durrow memorandum | Bhreathnach, Edel | Article in Book | | 2015 |
| Of bees and bracelets from the Banagher area | Whitfield, Niamh | Article in Journal | | 1992 |
| Of bogs, boats and bows : Irish archaeological wetland unit survey 2001 | McDermott, Conor | Article in Journal | | 2002 |
| Offaly : history and society : interdisciplinary essays on the history of an Irish county | | Monograph or Collective Volume | Geography Publications | 1998 |
| Offaly and the Civil War excecutions | McConway, Philip | Article in Journal | | 2008 |
| Offaly and the first air war | Gleeson, Joe | Article in Book | Esker Press | 2018 |
| Offaly arms holders 1832 | Kearney, John | Article in Journal | | 2008 |
| Offaly as a centre of early soccer activity in Ireland, 1877–86 | Moore, Martin | Monograph or Collective Volume | | 2023 |
| Offaly civilians and the 1916 Rising | | Article in Journal | | 2016 |
| Offaly Claimants 1916 | Powell, John Stocks | Monograph or Collective Volume | | 2023 |
| Offaly one hundred years ago | Byrne, MichaelWright, John | Monograph or Collective Volume | Esker Press | 1989 |
| Offaly one hundred years ago: the year 1913 | Byrne, Michael | Article in Journal | | 2013 |
| Offaly through time & its townlands | Lee, Thomas | Monograph or Collective Volume | Ottait Publishing | 2009 |
| Offaly tombstone inscriptions | Anonymous | Monograph or Collective Volume | Offaly Historical Society | 1983 |
| Offaly tradition : the Gaelic Athletic Association | Rouse, Paul | Article in Book | | 1998 |
| Offaly's 1798 rebels in Australia | Dawson, Tony | Article in Journal | | 2006 |
| Offaly's boglands c.1800-1998 | Martin, Jim | Article in Book | | 1998 |
| Old Ardcroney characters | Quigley, Patrick | Article in Journal | | 2001 |
| Old mills of Ireland, Vol. 4 : a listing of the old mills of Ireland taken from mid-19th century Valuation Office documents | | Monograph or Collective Volume | William E. Hogg | 2012 |
| On Gallen Green : the story of a west Offaly townland | Ryan, Brendan | Monograph or Collective Volume | White Grass Publications | 2020 |
| On to Athlone. The extension of the railway from Tullamore, 1857-1859 | Burke, Peter | Article in Journal | | 2006 |
| One hundred years of Clara history : a Goodbody family perspective : from the diary of Lydia Goodbody, 1841-1886 and Harold Goodbody's history of Clara, 1887-1947 | | Monograph or Collective Volume | Esker Press : The Offaly Historical and Archaeological Society | 2021 |
| Order of Malta, Tullamore : an album of memories, 1949–2019 | | Monograph or Collective Volume | Print Plus | 2019 |
| Origin of King's County : the King's County and Uí Failghe | Walsh, Paul, Revd, 1885-1941 | Article in Journal | | 1938 |
| Origins of King's County : the King's County and Uí Failghe | Walsh, Paul, Revd, 1885-1941 | Article in Journal | | 1938 |
| Our senior citizen | Dalton, Michael | Article in Book | | 2015 |
| P. & H. Egan Limited, Bridge House, Tullamore in the 1960s, | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Parish names in Ardagh and Clonmacnois | McNamee, James Joseph | Article in Journal | | 1942 |
| Participants and casualties in the First World War : the Tullamore experience | Byrne, Michael | Article in Book | Esker Press | 2018 |
| Patrick B. Delany's invention | Mahony, W. H. | Article in Journal | | 1924 |
| Patrick Kavanagh and his Tullamore connection : a lost genealogy | Agnew, Una | Article in Journal | | 2015 |
| Photographs from the Birr darkroom : Mary, countess of Rosse (1813-1885) | Barry, Susan | Article in Book | | 1997 |
| Plantation Ireland : a review of settlement history | Andrews, J. H. (John Harwood) | Article in Book | | 1999 |
| Plasterwork restoration at Birr castle : a restoration of seventeenth century plasterwork in the muniment room | Rosse, Alison | Article in Journal | | 1991 |
| Please God he will come home safely : Edenderry and the First World War | Reilly, Ciarán | Article in Book | Esker Press | 2018 |
| Policing in west Offaly, 1814-1922 | Ryan, Brendan | Monograph or Collective Volume | Offaly Historical & Archaeological Society | 2009 |
| Political developments in King's county, 1868-1885 | Moran, Gerard | Article in Book | | 1998 |
| Population change at Croghan, 1841-1911 | Dunne, Oliver | Article in Journal | | 2004 |
| Potterton people and places : three centuries of an Irish family; wtih a genealogy of the Tong family of Offaly as an appendix | Potterton, Homan | Monograph or Collective Volume | Choice Publishing | 2006 |
| Power, politics and parish formation in the medieval cantred of Ardnurcher: 1172-1690 | Masterson, Rory | Article in Journal | | 2011 |
| Prelude to rebellion: the 1916 'Tullamore affray' in context | Hughes, Paul | Article in Journal | | 2016 |
| Presentation Convent Rahan, Tullamore : a celebration of 175 years of service | | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 1995 |
| Prince Edward Island Canada - strong connection with Laois and Offaly | Murray, J. Darrach | Article in Journal | | 2008 |
| Printing and bookselling in Offaly in the nineteenth century | Byrne, Michael | Monograph or Collective Volume | Esker Press | 2020 |
| Prophets and evangelists (speaking from stone) | King, Heather | Article in Journal | | 1994 |
| Quakerism in the Edenderry area, 1673-1831 | Abbott, Therese | Article in Journal | | 2004 |
| Rahan looks back | Wrafter, Sister Oliver | Monograph or Collective Volume | The author | 1989 |
| Rahan monastic site : a conservation plan | Howley Hayes Architects | Monograph or Collective Volume | Offaly County Council | 2008 |
| Rahan parish, County Offaly : the O'Brien-Sherlock estate and the founding of the Presentation Convent | Byrne, Michael | Article in Journal | | 2018 |
| Rahan, Offaly : the larger church | Leask, H. G. (Harold G.) | Article in Journal | | 1938 |
| Rathrobin and the two Irelands : the photographs of Middleton Biddulph, 1900–1920 | Byrne, Michael | Monograph or Collective Volume | Esker Press | 2021 |
| Reactions toi the Rising | | Article in Journal | | 2016 |
| Recalling the British Legion in Tullamore | Byrne, Michael | Article in Book | Esker Press | 2018 |
| Receipt Books from Birr Castle, County Offaly, 1640–1920 | Clarke, Danielle | Article in Book | Royal Irish Academy | 2024 |
| Recollections of the history of the townlands of Durrow parish | Geoghegan, Fred | Article in Book | | 1994 |
| Recollections of Tullamore, 1963-2013 | Cullen, James P. | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Recruiting and the first aerial photograph of Tullamore | Byrne, Michael | Article in Book | Esker Press | |
| Rediscovering Columba's monastery at Durrow, Co. Offaly | O'Brien, Elizabeth | Article in Book | | 2012 |
| Reflections on the expansion of Tullamore over fifty years since the 1960s | Hussey, Vincent | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Reform als institutionelle Krise. Überlegungen zur Irischen Kirchenreform des 12 Jahrhunderts am Beispiel des klosters Clonmacnois | Kehnel, Annette | Article in Journal | | 1999 |
| Registers of a Midland parish, 1791-1810: Ballinahown, County Offaly and County Westmeath [with index] | | Article in Journal | | 2012 |
| Rehearsing for the theatre of war | Arrigan, BrendanCallaghan, StephenGreen, AshleyShine, Denis | Article in Journal | | 2019 |
| Reiclés in the Irish annals to AD 1200 | MacDonald, Aidan | Article in Journal | | 1999 |
| Remembered or forgotten : Tullamore and Offaly men in the First World War | Clarke, Vivienne | Article in Book | Esker Press | 2018 |
| Remembering the past ; a history of Killoughey church and cemetery | Condron, Breda | Monograph or Collective Volume | Author | 2019 |
| Reminiscences of county Offaly people. Peter Dunne on his career in the Irish Naval Service | Dunne, Peter | Article in Journal | | 2011 |
| Resolving the nebulae : the science and art of representing M51 | Kessler, Elizabeth A. | Article in Journal | | 2007 |
| Revealing the complexity of Early Ecclesiastical networks: Cross-slabs within and beyond the Hinterland of Clonmacnoise, Ireland | Ó Carragáin, Tomás; Colbert, Kate; Dempsey, Gary; Meere, Pat; Murray, Griffin, Ó Riain, Diarmuid | Article in Journal | | 2024 |
| Ringforts in the south-west midlands of Ireland | Stout, Matthew | Article in Journal | | 1991 |
| Robert James Goodbody : a Tullamore tobacco manufacturer | Goodbody, Michael | Monograph or Collective Volume | | 2023 |
| Rosalind Howard, the contradictory countess of Carlisle | Ridgway, Christopher | Article in Book | | 2018 |
| Royal Irish Constabulary, 1814-1922 | Ryan, Brendan | Article in Journal | | 2008 |
| Rubbings taken of the inscriptions on the Cross of the Scriptures, Clonmacnois | Ó Murchadha, Domhnall | Article in Journal | | 1981 |
| Rural electrification and the arrival of the "electric" in county Offaly | Gibbons, John | Article in Journal | | 2018 |
| S. Ciarán's church and his lands: a study of the history and development of Clonmacnois | Kehnel, Annette | Thesis | | 1995 |
| Safe harbour : the Grand Canal at Edenderry | Evans, Mairead | Monograph or Collective Volume | Edenderry Historical Society | 2002 |
| Salts/Tullamore Yarns, 1938–82: the largest employer in Tullamore for over thirty years | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Schooling in the Ballykilmurray/ Ballinamere area | Dalton, Michael | Article in Book | | 2015 |
| Scoil Phroinsias Naofa Clárach 1959-1996 | Anonymous | Monograph or Collective Volume | St Francis Boy's School | 1996 |
| Sculptors and their customers : a study of Clonmacnoise grave-slabs | Swift, Catherine | Article in Book | | 2003 |
| Seamus O'Brennan | | Article in Journal | | 2016 |
| Seán Barry of Tullamore : a volunteer who ‘was in any operation worthwhile in Offaly’ | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| See Rome and die : the burial-place of Donnchad Mac Briain | Duffy, Séan | Article in Journal | | 2014 |
| Settlers and natives in the Leix-Offaly plantation | Rowan, Brian | Article in Journal | | 1941 |
| Seventeenth-century West Offaly - accommodating the new realities | Lyttleton, James | Article in Journal | | 2004 |
| Shannonbridge : A History of Raghra c.1600 to c.1900 | Price, LauraRyan, Brendan | Monograph or Collective Volume | White Grass Publications | 2019 |
| Shopping in Tullamore since the 1960s: the coming of self-service and supermarkets | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Sic transit Gloria Dempsey | Goode, P. J. | Article in Journal | | 2003 |
| Simply a Tullamore man: A stonemason or a British gaol bird, or an Offaly/Irish rebel leader | O'Bracken, Fergus | Article in Journal | | 2016 |
| Sir Amthony St Leger and the outbreak of the Midland Rebellion, 1547-8 | Bryson, Alan | Article in Journal | | 2013 |
| Sir John Moore's inventory, Croghan, King's County, 1636 | Mac Cuarta, Brian | Article in Journal | | 2000 |
| Sisters of St Joseph of Cluny, Ferbane : celebrating 100 years of apostolate, 1896-1996 | Sheil, HelenSisters of St Joseph Cluny | Monograph or Collective Volume | The authors | 1996 |
| Sketches with the Microscope in a letter to a friend. Reproduced from the original edition of 1856 with new introductory essays by Michael Byrne and John Feehan. | Byrne, MichaelFeehan, JohnWard, Mary | Monograph or Collective Volume | Offaly Historical & Archaeological Society | 2019 |
| Slieve Bloom - the lost treasures : a history/folklore of the Slieve Bloom | Flanagan, Seán | Monograph or Collective Volume | The author | 2016 |
| Slieve Bloom from father to son | Scully, Tony | Monograph or Collective Volume | Slieve Bloom Rural Development Society Ltd. | 2002 |
| Social conditions in Daingean, 1800-1850 | Kearney, John | Article in Journal | | 2004 |
| Society outing to Roscrea and Leap Castle | Feerick, Aidan | Article in Journal | | 2024 |
| Some account of the O'Shiels of Westmeath and Offaly | Cox, Liam, 1908-2003 | Article in Journal | | 1990 |
| Some bronze ringed pins from the Irish Midlands | Fanning, Thomas | Article in Journal | | 1975 |
| Some early masonry churches and the round tower at Clonmacnoise | Manning, Conleth | Article in Book | | 2003 |
| Some early seventeenth-century building accounts in Ireland | Fenlon, Jane | Article in Journal | | 1998 |
| Some Offaly and Laois Wild Geese | Ó hAnnracháin, Eoghan | Article in Journal | | 2006 |
| Some thoughts on the Grand Canal | Gaffey, Maureen | Article in Book | | 2015 |
| Sources for Offaly history | Byrne, Michael | Monograph or Collective Volume | Offaly Research Library | 1978 |
| Sources for the study of the revolutionary period in King's County/Offaly, 1912-1923 | Shortall, Lisa | Article in Journal | | 2016 |
| Spanish documents relating to Ó Concobhair Failghe, 1761-1776 | Hazzard, Benjamin | Article in Journal | | 2022 |
| Speech by the former Taoiseach, made at the launch of the 'Calendar of Rosse Papers'; edited by A.P.W. Malcomson and published by the Irish Manuscripts Commission, Birr Castle | Cowen, Brian | Article in Journal | | 2011 |
| Speech by the former Taoiseach, on the occasion of the launch of Rahan Monastic Site conservation plan... in Rahan romanesque church, Tullamore, County Offaly | Cowen, Brian | Article in Journal | | 2011 |
| Sphagnum moss : the bog builders | Clara Youthreach | Monograph or Collective Volume | Print Plus | 2019 |
| St Columba's monastery at Durrow : some additional discoveries | King, Heather | Article in Book | | 2012 |
| St Columcille's Catholic church | Byrne, MichaelWalsh, Gerald | Article in Book | | 1994 |
| St Manchan and his shrine | Corkery, John | Monograph or Collective Volume | Corkery | 1970 |
| St. Colmán and the early medieval monastery of Lynally (c.600-1100) | Masterson, Rory | Article in Journal | | 2003 |
| St. Joseph & St. Saran's Ferbane : a celebration | | Monograph or Collective Volume | Bishop of Ardagh & Clonmacnois and Provincial of the Congregation of St. Joseph of Cluny | 2004 |
| St. Joseph and St. Saran's Ferbane : a celebration | | Monograph or Collective Volume | [s.n.] | 2004 |
| St. Mary’s Church of Ireland Shinrone | Committee members | Monograph or Collective Volume | St. Mary’s Church of Ireland Shinrone | 2020 |
| Stories from a sacred landscape : Crogan Hill to Clonmacnoise | O'Brien, Caimin | Monograph or Collective Volume | Offaly County Council|Mercier Press | 2006 |
| Stray fragments of local history | McNamee, James Joseph | Article in Journal | | 1940 |
| Suffragettes in the midlands and in Tullamore jail | Hogan, Margaret | Article in Journal | | 2004 |
| Surnames of county Offaly | Kearney, John | Article in Journal | | 1995 |
| Survey of Drumcullen (St. Barrind's) church, Drumcullen, Co. Offaly | McAlister, Deirdre K. | Article in Journal | | 2003 |
| Tahilly monastic site and High Cross | Bracken, AngelaDalton, Michael | Article in Book | | 2015 |
| Temple Finghin, and two unusual vourroirs from Clonmacnoise | Ní Ghrádaigh, Jenifer | Article in Journal | | 2005 |
| The 'Annals of Clonmacnoise (1627) as a translation and an early modern history | Casey, Denis | Article in Journal | | 2023 |
| The 'Battle of Tullamore' in 1806: the King's German Legion incident and the growth of a legend | Byrne, Michael | Article in Journal | | 2008 |
| The 'Cathedral', Temple Kelly and Temple Ciarán: notes from the annals | MacDonald, Aidan | Article in Book | | 2003 |
| The 'Red Man' of war and death. ... an alderwood figure deposited in the boglands of east Offaly during the Bronze age | Stanley, Michael | Article in Journal | | 2012 |
| The 'unity' of Cóemgen and Ciarán : a convent between Glendalough and Clonmacnoise in the tenth to eleventh centuries | Mac Shamhráin, Ailbhe | Article in Book | | 1994 |
| The 1641 depositions in King's County | Ryan, Brendan | Article in Journal | | 2015 |
| The abbatial succession at Clonmacnois from the foundation of the monastery to the coming of the Norse (A.D. 545-799) | Ryan, John | Article in Book | | 1995 |
| The Anglo-Norman advance into Ely O'Carroll, 1185-1221 | Cunningham, George | Thesis | | 1986 |
| The appeal of Thomas Franke to the Court of Claims, 1666 | Franke, Thomas | Article in Journal | | 2018 |
| The archaeology of Durrow | FitzPatrick, Elizabeth | Article in Book | | 1994 |
| The archaeology of Lemanaghan : the story of an Irish bog | O'Carroll, Ellen | Monograph or Collective Volume | Wordwell | 2001 |
| The archaeology of the Slieve Bloom | Ó Hanluain, Enri | Article in Journal | | 1938 |
| The assassination of Lord Norbury at Durrow | Byrne, Michael | Article in Book | | 1994 |
| The astronomy of Birr castle | Moore, Patrick | Monograph or Collective Volume | [s.n.] | 1971 |
| The Ballinamere Ceili Band | Dalton, MichaelNolan, Tom | Article in Book | | 2015 |
| The ballot box and the gun : the war of independence in County Offaly in 1920 | Byrne, Michael | Article in Journal | | 2020 |
| The Ballycumber Bog-slide | Praeger, R. Lloyd
| Article in Journal | | 1906 |
| The Ballynowlart martyrs | Milner, William Henry | Article in Journal | | 1965 |
| The base of the North Cross at Clonmacnoise | Manning, Conleth | Article in Journal | | 1992 |
| The Birr courthouse and bridewell : 1810–2013 | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| The bog body from Tumbeagh | Birmingham, NóraDelaney, Máire | Monograph or Collective Volume | Wordwell | 2006 |
| The Book of Durrow | Tunney, John | Article in Book | | 1994 |
| The Book of Durrow : a medieval masterpiece at Trinity College Dublin | Meehan, Bernard | Monograph or Collective Volume | Town House | 1996 |
| The Book of Glendalough, or Rawlinson B502 | Ó Riain, Pádraig | Article in Journal | | 1981 |
| The Bulfins of Derrinlough, Co. Offaly | White, Anna | Article in Journal | | 2006 |
| The burning of country houses in Co. Offaly during the revolutionary period, 1920-3 | Reilly, Ciarán J. | Article in Book | | 2011 |
| The burning of Tullamore courthouse, jail and barracks by the anti-Treaty IRA on 20 July 1922 with a note on surviving local authority records | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| The by-elections in King's County/Offaly in 1914 and 1918 | Byrne, Michael | Article in Journal | | 2016 |
| The Cartlands of Ballykillen and Lumville. Landowners, yeomen and magistrates | Reilly, Ciarán J. | Article in Journal | | 2008 |
| The case of Alice Delin (Dillon) of Geashill: a death in gaol without due process of law | Byrne, Michael | Article in Journal | | 2013 |
| The changing borders of the Ely O'Carroll lordship | Loeber, Rolf | Article in Book | | 1998 |
| The changing face of Offaly towns in the early 1900s : An illustrated history of Offaly towns in a time of modernisation | Byrne, Michael | Monograph or Collective Volume | Esker Press | 2024 |
| The changing landscape of Clara bog : a history of an Irish raised bog | Connolly, AndrewCrushell, Patrick | Article in Journal | | 2008 |
| The chronological structure of the sixth age in the Rawlinson fragment of the 'Irish World-Chronicle' | Miller, Molly | Article in Journal | | 1991 |
| The chronology of the life of St Ciaran of Clonmacnois | MacNamee, James Joseph | Article in Journal | | 1945 |
| The Clonbrock murder | White, Margaret | Article in Journal | | 2004 |
| The compaign for rent reductions on the Digby estate, King's County, 1879-1882 | Pilkington, Mary | Article in Journal | | 2008 |
| The Conolly archive | Malcomson, A. P. W.Walsh, Patrick, | Monograph or Collective Volume | Irish Manuscripts Commission | 2010 |
| The contribution of Clara to the early days of radio | Goodbody, Michael | Monograph or Collective Volume | | 2023 |
| The country house and the Great Famine: Mildred Darby's novel, 'The hunger' | Reilly, Ciarán | Article in Book | | 2018 |
| The county courthouse at Tullamore and the making of a county town | Byrne, Michael | Article in Journal | | 2003 |
| The County Offaly First World War memorial, O'Connell Square, Tullamore | Byrne, Michael | Article in Book | Esker Press | 2018 |
| The courts of assize in King’s County/Offaly in the years 1914–21 | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| The courtship, marriage and honeymoon of a Church of Ireland rector in post-Famine Ireland | Reilly, Ciarán | Article in Book | | 2019 |
| The crown lands at Kinnitty | O'Neill, Tim P. | Article in Journal | | 2018 |
| The date of the round tower at Clonmacnoise | Manning, Conleth | Article in Journal | | 1997 |
| The De Burgo chalice | Dalton, Michael | Article in Book | | 2015 |
| The dear old town : a history of Ferbane in the 18th and 19th centuries | Ryan, Brendan | Monograph or Collective Volume | White Grass Publications | 2003 |
| The death of Jim Farrell: Community, society and mortality in County Offaly in the early 1900s | Farrell, Lorna B. | Article in Journal | | 2013 |
| The declining fortunes, strength, and influence of the Home Rule movement in Offaly, 1910 to 1916 | McEvoy, Sean | Article in Journal | | 2016 |
| The DeRenzys of Tinnycross | Shortall, Lisa | Article in Journal | | 2015 |
| The design and management of a midlands town : The development of Edenderry 1809-1845 and 2000-2010 | Merrick, Caoimhe | Article in Journal | | 2015 |
| The devastating cholera outbreak of 1832 | Fennelly, Teddy | Article in Journal | | 2014 |
| The development of Tullamore, 1700-1921 | Byrne, Michael J. | Thesis | | 1980 |
| The diary of an Offaly schoolboy, 1858-59 | Davis, William | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 2010 |
| The diary of Geraldine Fitzgerald, a Birr nurse working from Stephen's Green during Easter Week 1916 | Fitzgerald, Geraldine | Article in Journal | | 2016 |
| The distilling industry in Offaly 1780-1954 | Byrne, Michael | Article in Book | | 1980 |
| The distribution of Irish scriptoria and centres of learning | Hughes, Kathleen Winifred | Article in Book | | 1958 |
| The Earl of Kildare's manor of Geashill, in the King's County ; with notes on Killeigh, in the parish of Geashill | Fitzgerald, Walter, Lord | Article in Journal | | 1921 |
| The earliest plans of Clonmacnoise | Manning, Conleth | Article in Journal | | 1994 |
| The early church in Offaly | FitzPatrick, Elizabeth | Article in Book | | 1998 |
| The early history of the town of Birr or Parsonstown | Cooke, Thomas LalorHogan, Margaret | Monograph or Collective Volume | Esker Press | 1990 |
| The early seventeenth-century Ulster and Midland plantations, part 1 : pre-plantation architecture and building regulations | Loeber, Rolf | Article in Book | | 2012 |
| The early seventeenth-century Ulster and Midland plantations, part 2 : the new architecture | Loeber, Rolf | Article in Book | | 2012 |
| The earthwork castles of Anglo-Norman Offaly | O'Brien, Caimin | Article in Book | | 1998 |
| The eating out experience in Tullamore in the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The Edenderry Museum of Irish antiquities | Finnegan, Mairead | Article in Journal | | 2020 |
| The efficacy of statutory planning in the development of Tullamore, 1987-2004 | McCabe, Fergal | Article in Journal | | 2006 |
| The Egans of Moate and Tullamore : business and politics | Egan, DavidEgan, Maurice | Monograph or Collective Volume | Esker Press | 2020 |
| The enhancement of Tullamore’s public infrastructure: early 1960s – 2014 | Sweeney, Niall | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The erroneous elemental : (de) constructing the legend of Leap | Hebblethwaite, Kate | Article in Book | | 2007 |
| The evolution of the Irish Land Agent: The management of the Blundell Estate in the Eighteenth Century | Reilly, Ciarán | Article in Book | Edinburgh University Press | 2018 |
| The experience of being a councillor | Gallagher, Pat | Article in Book | | 2001 |
| The family of Charlton, of Clonmacnoise and formerly of Curraghtown | Shaw, J. C. H. | Article in Journal | | 1969 |
| The Famine diaries and sketches of John Plunket Joly | Reilly, Ciarán | Article in Book | | 2018 |
| The famine in Offaly | O'Neill, Timothy P. | Article in Book | | 1998 |
| The Famine-era memoirs of Geashill dispensary doctor Dr Lombe Atthill (1827– 1910), (later the Master of the Rotunda Hospital) | McCabe, Ciarán | Monograph or Collective Volume | | 2023 |
| The Ferbane Arma Christi | Ryan, Brendan | Article in Journal | | 2006 |
| The finding of Arthur's grave : a story from Clonmacnoise? | Carey, John | Article in Book | | 1999 |
| The finding of the De Burgo-O’Malley chalice | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| The first and last Offaly-born soldiers killed in the Great War | Byrne, Michael | Article in Book | Esker Press | 2018 |
| The first plantation of Ireland and how Offaly became misnamed | O'Donovan, Peadar | Article in Journal | | 1996 |
| The forgotten navigator : Saint Barron of Drumcullen | Lyons, Sean | Monograph or Collective Volume | Holly Ridge Press | 2003 |
| The GAA and nationalism in Offaly 1884-1918 | McEvoy, Sean | Article in Journal | | 2016 |
| The gentry of the king's and queen's counties : protestant landed society, 1690-1760 | Beaumont, D. M. | Article in Journal | | 2001 |
| The gentry of the King's and Queen's Counties: Protestant landlord society, 1690-1760 | Beaumont, Daniel Matthew | Thesis | | 1999 |
| The Goodbodys of Tullamore. A story of tea, tobacco and trade | Goodbody, Michael | Article in Journal | | 2008 |
| The Gospel Book of Macregol of Birr | Hogan, Margaret | Article in Journal | | 2009 |
| The Gospels of Mac Regol of Birr; a study in Celtic illumination | Hemphill, Samuel | Article in Journal | | 1912 |
| The harvest in northern Offaly | Delaney, J. G. | Article in Book | | 1980 |
| The heritage of Clonmacnoise | Anonymous | Monograph or Collective Volume | Environmental Sciences Unit T.C.D. and County Offaly V.E.C. | 1987 |
| The high cross base at Seir Kieran, Co. Offaly | Harbison, Peter | Article in Book | | 2012 |
| The high crosses of Tech Theille (Tihilly), Kinnity, and related sculpture | De Paor, Liam | Article in Book | | 1987 |
| The Horseleap branch - 1 | O'Meara, John | Article in Journal | | 2008 |
| The Horseleap branch - 1 | O'Meara, John | Article in Journal | | 2008 |
| The Horseleap branch - 2 | O'Meara, John | Article in Journal | | 2009 |
| The Horseleap branch - 2 | O'Meara, John | Article in Journal | | 2008 |
| The Howth Gunrunning Incident | | Article in Journal | | 2016 |
| The Huguenot settlement at Portarlington, 1692-1771 | Hylton, Raymond | Article in Book | | 1987 |
| The human face of the territory of Eile | Fitzpatrick, LizLeonard, Aoife | Article in Journal | | 1992 |
| The Irish faction fighters of the 19th century | O'Donnell, P. D. | Monograph or Collective Volume | Anvil | 1975 |
| The Irish land agent, 1830-60 : the case of the King's County | Reilly, Ciarán J. | Monograph or Collective Volume | Four Courts | 2014 |
| The Irish language in county Offaly | Williams, Nicholas | Article in Book | | 1998 |
| The Irish Republic flag | | Article in Journal | | 2016 |
| The Irish revenues of Oliver St John, Viscount Grandison for 1625-9 | Mac Cuarta, Brian | Article in Journal | | 2014 |
| The Jacobean plantations in seventeenth-century Offaly : an archaeology of a changing world | Lyttleton, James | Monograph or Collective Volume | Four Courts | 2013 |
| The John Keegan of Moate diary : the Famine years and south Offaly | Byrne, Michael | Article in Journal | | 2020 |
| The Kilcormac Missal | Mullins, Patrick | Article in Book | | 2013 |
| The King's county (now county Offaly) : epitome of its history, topography etc. | Joyce, J. St. George | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 1998 |
| The landscape of Slieve Bloom : a study of its natural and human heritage | Feehan, John | Monograph or Collective Volume | Blackwater | 1979 |
| The Lanz revolution | Dalton, Michael | Article in Book | | 2015 |
| The last acquisition - completing the circle bead by bead | Cahill, Mary | Article in Journal | | 2017 |
| The Law of the Innocents - 'Cáin Adomnáin' - today | Houlihan, James W. | Article in Journal | | 2024 |
| The Leinster regiment | Jones, Mark | Monograph or Collective Volume | | 2023 |
| The Leix-Offaly plantation | Rowan, Bernard L.J. | Thesis | | 1940 |
| The Leviathan of Parsonstown | Moore, John | Article in Journal | | 2001 |
| The Leviathan of Parsonstown : Ambitions and Achievements | Hoskin, Michael | Article in Journal | | 2002 |
| The life of St. Ciarán of Saighir | Sqerber, Ingrid | Article in Book | | 1998 |
| The life, the times, the people ...(Clonbullogue, Bracknagh, Walsh Island) | | Monograph or Collective Volume | [s.n.] | 1993 |
| The Lodge of Banagher (no. 306), 1758-1859 | Berry, H. P. | Article in Journal | | 1986 |
| The Loft | O’Brien, Ted | Article in Book | | 2015 |
| The long ridge : towards a history of Killeigh parish | Kearney, John | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 1992 |
| The lordship of O'Conor Faly, 1520-1570 | Fitzsimons, Fiona | Article in Book | | 1998 |
| The M7 motorway historical landscape: studies in the history of Ikerrin and Elyocarroll | McCotter, Paul | Article in Journal | | 2013 |
| The MacCoghlans of Delvin Eathra : the transformation of a late medieval lordship in early modern Ireland | Lyttleton, James | Article in Book | | 2007 |
| The Magawlys of Temora and the Banons of Brouchal County Offaly | Byrne, Michael | Article in Journal | | 2011 |
| The making of 'Faithful Rising' | Smyth, Miriam[Hoctor, Gary] | Article in Journal | | 2016 |
| The man who walked off the map : Lt. Col. Charles K. Howard-Bury (1883-1963) | Reynolds, Adrian P. | Article in Journal | | 2005 |
| The mass bush | Dalton, Michael | Article in Book | NA | 2015 |
| The Mass Rock | Gaffey, M. | Article in Book | NA | 2015 |
| The medieval churches of County Offaly | FitzPatrick, ElizabethO'Brien, Caimin | Monograph or Collective Volume | Government of Ireland | 1998 |
| The memorial slabs of Clonmacnois, King's County | Macalister, R. A. S. (Robert Alexander Stewart) | Monograph or Collective Volume | [s.n.] | 1909 |
| The Midlands Butter & Bacon Company Limited, Tullamore, 1928–89, | Guerin, Noel | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The military burials and memorials at Birr: From the pyramids of Egypt to the beaches of Normandy | Callaghan, Stephen | Article in Journal | | 2013 |
| The Minute Book of the Edenderry Poor Law Union, 1895 | Reilly, Ciarán | Article in Journal | | 2013 |
| The monastery of Gallen, Offaly | Pinkman, John | Article in Journal | | 1945 |
| The Moony family of the Doon, county Offaly and other kindred lines | Cox, Liam, 1908-2003 | Article in Journal | | 1986 |
| The murder of Wiliam Ross Manifold, 1852 | Lambe, Roisin | Article in Journal | | 2015 |
| The Music in the Irish Country House project : origins and objectives | Mullaney-Dignam, Karol | Article in Book | | 2011 |
| The Mysterious Moment of Resurrection in Early Anglo-Saxon and Irish Iconography | Fadda, Anna Maria Luiselli | Article in Book | | 2007 |
| The nature of Anglo-Norman settlement in western Offaly | Corcoran, Adrian | Article in Journal | | 2004 |
| The Nestors of Kilnagarnagh: the discovery of an ancestral family line | McCann, Rosemary | Article in Journal | | 2013 |
| The Nolans football royalty across Clara, Offaly, Leinster, New York | Browne, Billy | Monograph or Collective Volume | | 2021 |
| The O'Carrolls of Offaly : their relations with the Dublin authorities in the sixteenth century | Venning, Timothy | Article in Book | | 1998 |
| The O'Dempsey chronicles. Vol. 1, Lords and chiefs of Clanmalier | Goode, P. J. | Monograph or Collective Volume | Cloneygowan Press | 2008 |
| The Odlums of Offaly | Graham, D. L. | Article in Journal | | 1989 |
| The Offaly war dead : a history of the casualties of the First World War] | Burnell, Tom | Monograph or Collective Volume | History Press | 2010 |
| The opening of the railway to Tullamore - 1854 | Burke, Peter, writer on Irish railways | Article in Journal | | 2004 |
| The Ordnance Survey Letters of King's County: their place in the historical literature of the county | Byrne, Michael | Article in Journal | | 2013 |
| The origins and early history of the Sionnach Foxes : from the founding fathers to the late twelfth century | Fox, M. J.Fox, Michael | Article in Journal | | 2003 |
| The O’Connor Faly Lordship of Offaly, 1395-1513 | Ó Cléirigh, Cormac | Article in Journal | | 1996 |
| The P. & P. B. R. or the stolen railway | King, Seamus A. | Article in Journal | | 2012 |
| The parish of Banagher | Donnelly, Philip | Monograph or Collective Volume | Impact Printing | 1996 |
| The Parsons of Monkstown, Birr and Newcastle-upon-Tyne | Quinn, Tony | Article in Journal | | 1999 |
| The Parsons of Parsonstown | Murphy, Frank | Article in Journal | | 1965 |
| The part townland of Curraghbee | McNeill, Stephen | Article in Journal | | 2003 |
| The peculiar case of Tarlagh O'Melaghlin, parish priest and lord of Clancolman | Cox, Liam, 1908-2003 | Article in Journal | | 1977 |
| The Peirce family from Offaly | Conheady, Patricia | Article in Journal | | 1992 |
| The people called Methodists :- from the Irish Free State to the Irish Republic | Cooney, Dudley Levistone | Article in Journal | | 2015 |
| The people of Tullamore in the twentieth century : an album of memories | Byrne, Michael | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 2000 |
| The plantation of Ely O'Carroll, 1619-93 | Atkinson, N.D. | Thesis | | 1958 |
| The plantation of Leix and Offaly, 1556-1622 | Dunlop, Robert | Article in Journal | | 1891 |
| The poet and the rose | Ryan, Brendan | Article in Journal | | 2008 |
| The political career of Thomas Radcliffe, 3rd Earl of Sussex (1526?-1583) | Doran, Susan | Thesis | | |
| The prehistory of the Offaly peatlands | McDermott, Conor | Article in Book | | 1998 |
| The Presentation Sisters, Killina : a photographic collection | Presentation Sisters Rahan | Monograph or Collective Volume | Presentation Sisters Rahan | 2019 |
| The priory and parish of Killeigh | Comerford, M., P.P. | Article in Journal | | 1883 |
| The problems of defence : a regional case-study | Ó Cléirigh, Cormac | Article in Book | | 1997 |
| The Protestant minority in County Offaly in the early twentieth century | Turner, Sylvia | Monograph or Collective Volume | | 2023 |
| The provincial press in the south midlands : from mission to mammon, 1831-2004 | Byrne, Michael | Article in Journal | | 2005 |
| The pub in Tullamore since the 1960s: from licensed grocery to super lounge bar and ‘meeting in the smoking area’ | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The railway house : tales from an Irish fireside | Kennerk, Barry | Monograph or Collective Volume | Appletree Press | 2008 |
| The rare survival of a defensive mud enclosure at Castletown-Clonyn-Rahyn (Co. Offaly) | Loeber, Rolf | Article in Journal | | 2003 |
| The religious life | Dalton, MichaelO’Brien, Rory | Article in Book | | 2015 |
| The reminiscences of a chauffer | Hoysted, F. J. | Monograph or Collective Volume | The author | 1998 |
| The Rev. Dudley Fletcher's "spot of bother" | Mathews, Ronnie | Article in Journal | | 2005 |
| The road from Castlebarnagh: growing up in Irish music, a memoir | O'Brien, Paddy | Monograph or Collective Volume | Orpen Press | 2012 |
| The scene in King's County in 1914 | Byrne, Michael | Article in Journal | | 2015 |
| The seventeenth century Down survey : a study of the barony map of Ballybritt | Cullinane, Elaine | Article in Journal | | 2005 |
| The Shannon Stream Cabinet and Chair Works, Banagher, 1914–1919 | Byrne, Michael | Article in Journal | | 2020 |
| The Shannonbridge fortifications | Kerrigan, P. M. | Article in Journal | | 1974 |
| The shape of the Durrow cross | Stevick, Robert D. | Article in Journal | | 1999 |
| The shrine of the last high-king? | Mannng, ConlethSevastopulo, George | Article in Journal | | 2019 |
| The significance of the villages and small towns in rural Ireland during the eighteenth and nineteenth centuries | Hood, Susan | Article in Book | | 2002 |
| The Sionnach Foxes during the middle ages : 1170-1550 | Fox, M. J.Fox, Michael | Article in Journal | | 2004 |
| The Sisters of Mercy of Birr and Nenagh | O'Brien, Sister Pius | Monograph or Collective Volume | Congregation of the Sisters of Mercy, Killaloe Mercy Generalate | 1994 |
| The South Cross, Clonmacnois (with an appendix on the incidence of vine-scroll on Irish sculpture) | Edwards, Nancy | Article in Book | | 1986 |
| The status of the sculptor in Old-Irish law and the evidence of the crosses | Mac Lean, Douglas | Article in Journal | | 1995 |
| The stolen railway : the Parsonstown & Portumna Bridge railway (1868-1878) | Coleman, Joe FCILT | Article in Journal | | 2012 |
| The stolen railway today. The Parsonstown & Portumna Bridge Railway (1868-1878) | Coleman, Joe | Article in Journal | | 2012 |
| The story of a rigged "convention" | Muldoon, John | Monograph or Collective Volume | United Irish League | 1915 |
| The Story of Birr’s Russian cannon | Huddle, Paul | Article in Journal | | 2020 |
| The story of brick making in Pollagh | Devery, Catriona | Monograph or Collective Volume | Pollagh Heritage Group | 2019 |
| The Story of Clonmacnois | Giff, William Lee Martin, Rev. | Monograph or Collective Volume | Athlone Printing Works [printer] | 1954 |
| The story of Clonmacnois | Doyle, Doirin | Monograph or Collective Volume | Kamac Publications | 1968 |
| The story of Clonmacnoise | Macalister, R. A. S. (Robert Alexander Stewart) | Article in Journal | | 1937 |
| The story of Father Andrew Mullen and Daingean tombstone inscriptions | | Monograph or Collective Volume | Offaly Historical Society | 1985 |
| The story of Ireland : a history of an ancient family and their country | Magan, William | Monograph or Collective Volume | Element | 2000 |
| The survey of Offaly in 1550 | Curtis, Edmund, 1881-1943 | Article in Journal | | 1930 |
| The T.D.s and senators for Laois and Offaly 1921-1986 | Meehan, Patrick F. | Monograph or Collective Volume | Leinster Express Newspapers | 1987 |
| The three R's - one hundred years ago | Hume, John | Article in Journal | | 2005 |
| The tower on Mullagh Hill, Co. Offaly | McKenna, Rachel | Article in Book | | 2016 |
| The tower on Mullagh Hill, Tullamore, Co. Offaly | McKenna, Rachel | Article in Journal | | 2018 |
| The Tullamore malt workers strike fiasco of 1916 and the malting industry in Tullamore | Byrne, Michael | Article in Journal | | 2016 |
| The Tullamore properties of the Manly family : a sidelight on the malting, brewing and distilling industries in a midland town | Byrne, Michael | Article in Journal | | 2015 |
| The Turpin family of Tullamore, Co. Offaly | Brown, Robert W. | Article in Journal | | 1984 |
| The Ushers of Birr | Masters, J. M. | Article in Journal | | 1978 |
| The very earliest plan of Clonmacnoise | Manning, Conleth | Article in Journal | | 1998 |
| The village master taught his little school : the educational links between north Longford and west Offaly | Ryan, Brendan | Article in Journal | | 2013 |
| The vocational education movement : the midland experience | Byrne, Michael | Monograph or Collective Volume | Offaly Vocational Education Committee | 1980 |
| The Wakelys of Ballyburly | O’Neill, Tim | Monograph or Collective Volume | | 2023 |
| The Wakelys of Navan and Ballyburly : a discussion of a sixteenth-century family | Hickey, Elizabeth | Article in Journal | | 1974 |
| The War of Independence in Offaly | Nolan, Tom | Article in Journal | | 2013 |
| The War of Independence in the Midlands. A conference organised by the Old Athlone Society to mark the 90th anniversary of the end of the war. Custume Barracks, Athlone, 26 November 2011 | | Article in Journal | | 2013 |
| The Williams Group Tullamore: making the transition in the 1960s from a family concern to one of the largest private companies in Ireland, | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| The woods of Ireland : a history, 700-1800 | Everett, Nigel | Monograph or Collective Volume | Four Courts | 2014 |
| The Workhouses of Ireland and their manifestation in King's County | Ryan, Brendan | Article in Journal | | 2018 |
| The world of Adomnán | Herbert, Máire | Article in Book | | 2001 |
| The world of goods and county Offaly in the eighteenth century | Barnard, T. C. (Toby Christopher) | Article in Book | | 1998 |
| The young haymakers : a midland boyhood | Murray, Tom | Monograph or Collective Volume | Kimleigh Books | 1999 |
| Thomas Mitchell and the passing of the old order in Birr, 1914–1918 | Byrne, Michael | Article in Journal | | 2020 |
| Three nineteenth-century drawings of Clonmacnoise | Harbison, Peter | Article in Book | | 2003 |
| Through the locks | Kilally, CaitrionaO'Reilly, Joe | Monograph or Collective Volume | St. Mary's Secondary School|Oaklands Community College | 2001(?) |
| Throwing off the yoke | McDermott, ConorMoore, CathyMurray, CaraStanley, Michael, 1973- | Article in Journal | | 2003 |
| Tihilly High Cross: an exploration of the background, dating, interpretation and commentary on the Tihilly monastic site and High Cross | Harbison, Peter | Article in Journal | | 2013 |
| Towards a history of Croghan Hill | | Monograph or Collective Volume | Phoenix Press | 1974 |
| Towards a history of Kilclonfert | | Monograph or Collective Volume | ANCO/Offaly Historical Society | 1984 |
| Towards an architectural history of the Leix and Offaly plantations | D'Alton, Máirtín | Article in Journal | | 2006 |
| Towns and plantations, 1500-1700 | Buchanan, R. H. (Ronald Hull) | Article in Book | | 1986 |
| Trade roots : Offaly's 3 anniversaries : Grand Canal 1804, Tullamore Distillery 1829, Great Southern and Western Railway 1854 | Grand Canal 200 Committee | Monograph or Collective Volume | Grand Canal 200 Committee | 2004 |
| Train crash at Brosna | Burke, Peter, writer on Irish railways | Article in Journal | | 2003 |
| Transplanting China to Ireland : three generations of the Earls of Rosse | Parsons, Brendan, 7th Earl of Rosse | Article in Book | | 2009 |
| Treasures of County Offaly | Kelly, Eamonn P. | Article in Journal | | 2009 |
| Tullabeg Rahan, Tullamore 1818-1991 | Byrne, Michael | Article in Journal | | 2004 |
| Tullamore | Moran, William | Article in Journal | | 1962 |
| Tullamore | Byrne, Michael | Article in Book | | 1995 |
| Tullamore : a portrait | Byrne, Michael | Monograph or Collective Volume | Esker Press for Offaly Historical Society | 2010 |
| Tullamore : architectural heritage | Garner, William | Monograph or Collective Volume | Foras Forbartha | 1980 |
| Tullamore : the growth process, 1785-1841 | Byrne, Michael | Article in Book | | 1998 |
| Tullamore and its environs | Freeman, T. W. | Article in Journal | | 1948 |
| Tullamore and surrounding parishes in Dictionary of Irish Saints | Ó Riain, Pádraig | Article in Journal | | 2013 |
| Tullamore Catholic church : a historical survey | Byrne, Michael | Monograph or Collective Volume | Tullamore Parish Committee | 1987 |
| Tullamore D. E. W. Distillery | Byrne, Michael | Article in Journal | | 2015 |
| Tullamore D.E.W. Distillery: An iconic brand leader for Tullamore and Ireland | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Tullamore Dew Irish Whiskey and Irish mist Liqueur : a short introduction and trails of the town | | Monograph or Collective Volume | Tullamore Dew Heritage Centre & Offaly Exhibition and Research centre | 2000 |
| Tullamore Hotel | Delaney, Ruth | Article in Journal | | 1973 |
| Tullamore Hotels since the 1960s | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Tullamore in 1916 : the making of the Tullamore incident | Byrne, Michael | Monograph or Collective Volume | Esker Press for Offaly Historical and Archaeological Society | 2016 |
| Tullamore in the 1960s: a decade of significant change | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Tullamore in the 1960s: A town in transition | MacCabe, Fergal | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Tullamore in the Sixties : A decade of innovation and improvement | NA | Monograph or Collective Volume | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Tullamore Rugby Club : the story of fifty years, 1937-87 | Byrnes, Michael | Monograph or Collective Volume | Tullamore Rugby Club | 1987 |
| Tullamore town album | Byrne, Michael | Monograph or Collective Volume | Esker Press | 1988 |
| Tullamore town: a timeline of events from 1960 to 1972 | Adams, Terry | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Tullamore: a select bibliography | Byrne, Michael | Article in Book | Offaly Historical and Archaeological Society (Offaly History) | 2024 |
| Turnpike roads of Kildare, Queen's County, etc., in the eighteenth century | O'Leary, Edward | Article in Journal | | 1914 |
| Two early medieval cross slab fragments from Clonlyon Glebe, Co. Offaly | King, Heather | Article in Journal | | 2008 |
| Two of Tullamore’s finest Georgian houses : numbers 43 and 44 High Street | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| Two Saints & a Lot of Us Sinners: A History of One of Ireland's Oldest Inhabited Castles | Thompson, Brian Donovan | Monograph or Collective Volume | Orla Kelly | 2020 |
| Two sculptural fragments from Clonmacnoise | Edward, Nancy | Article in Journal | | 1984 |
| Two troublesome abbots | Dumville, David N. | Article in Journal | | 1990 |
| Uí Fhailghe, Uíbh Fhailí, etc. | Ó Muraíle, Nollaig | Article in Journal | | 2003 |
| Uncertain times : some experiences of the Goodbody family in Clara, 1919-1923 | Goodbody, Michael | Article in Journal | | 2020 |
| Unearthing the past: the rediscovery of Blundell's mine(s), Edenderry, County Offaly | Critchley, Martin F.Schwartz, Sharron P. | Article in Journal | | 2011 |
| War of Independence, Black and Tans in Ireland and the Danny O’Brien factor | O’Brien, Ted | Article in Book | | 2015 |
| West Offaly and the 1916 Rising | Heavin, Padraig | Article in Journal | | 2016 |
| Westmeath news from Buenos Aires as reported in 'The Standard and River Plate News' | Walsh, Edward | Article in Journal | | 2017 |
| What did people die of during the Great Famine? The world of James Dillon (1788-1859), Offaly county coroner | Reilly, Ciarán | Article in Book | | 2016 |
| Whitby and Clonmacnoise | Emerick, Keith | Article in Book | | 2003 |
| Who was Terry Alt? | Mac Mahon, Michael | Article in Journal | | 2019 |
| William Bulfin | | Article in Journal | | 2016 |
| William Mulraney | | Article in Journal | | 2016 |
| William Steuart Trench and his management of the Digby estate, King's County, 1857-71 | Delaney, Mary | Monograph or Collective Volume | Four Courts Press | 2012 |
| Without favour or affection : transported Irish constables - 1823-4 | Harrison, Jennifer | Article in Journal | | 2003 |
| Women and the Great War in King's County, 1914-1918 | Walsh, Fionnuala | Article in Book | Esker Press | |
| Writings on Offaly History 2018 | Byrne, Michael | Article in Journal | | 2020 |
| Writings on Offaly history, 2016 | Byrne, Michael | Article in Journal | | 2018 |
| ‘This bloody and accursed Empire’ | Kildea, Jeff | Article in Journal | | 2020 |
| ‘When the nightjar returns’ : the natural history and human story of Killaun bog, County Offaly | Feehan, JohnSt Brendan’s Community School Birr | Monograph or Collective Volume | Walsh Printers | 2021 |
| “I am a useful man, and no one better than me” : John Neville, the Birr Workhouse Messenger | Leonard, Cormac | Monograph or Collective Volume | | 2023 |