| County Longford and its people : an index to the 1901 census for county Longford | Leahy, David | Monograph or Collective Volume | Flyleaf | 1990 |
| County Longford and World War I | Leahy, David | Article in Book | | 2010 |
| County Longford eyewitness accounts of World War I | Leahy, David | Article in Journal | | 2008 |
| County Longford survivors of the great famine : a complete index to Griffith's primary valuation of Co. Longford (1854) | Leahy, David | Monograph or Collective Volume | Derryvrin | 1996 |
| Interesting data from our troubled past | Leahy, David | Article in Journal | | 2013 |
| The Clintons of County Longford | Leahy, David | Article in Journal | | 2006 |