| 'Orphans formerly under the care' of the Cavan Protestant Orphan Society (1844-1879) | Smyth, Jonathan A. | Article in Journal | | 2024 |
| A bibliography of County Cavan based on the collection of books and journals in the Local Studies section at the Johnston Central Library | Smyth, Jonathan A. | Article in Book | | 2014 |
| A high-society wedding in Cavan (1853) | Smyth, Jonathan A. | Article in Book | | 2019 |
| All Saints, Cootehill, 1819-2019 : a history of the church, the parish and its people | Smyth, Jonathan A. | Monograph or Collective Volume | Cumann Seanchais Bhreifne | 2019 |
| Bailieborough parisioners in the mid-nineteenth century | Smyth, Jonathan A. | Article in Journal | | 2019 |
| Bishop Alfred George Elliott (1858-1915) 'An able man, though somewhat odd in his ways" | Smyth, Jonathan A. | Article in Journal | | 2023 |
| Cemetery inscriptions from Ashfield, Clementstown and Dernakesh | Smyth, Jonathan A. | Article in Journal | | 2010 |
| Gentleman & scholar : Thomas James Barron, 1903-1992 | Smyth, Jonathan A. | Monograph or Collective Volume | Cumann Seanchais Bhreifne | 2012 |
| Guide to 'Breifny Antiquarian Society Journal' (1920-1933) | Smyth, Jonathan A. | Article in Journal | | 2011 |
| John Richard Darley (1799-1884): bishop, scholar and philanthropist | Smyth, Jonathan A. | Article in Journal | | 2008 |
| Marriage settlement of Samuel Dundass and Lydia Leadbeater, daughter of Garrett Leadbeater of Cootehill, 20 June 1827 | Smyth, Jonathan A. | Article in Journal | | 2016 |
| The establishment of Cootehill Branch Railway | Smyth, Jonathan A. | Article in Journal | | 2007 |