| 'Ears stunned with the din of arms': Belfast volunteer sermons and James Magee | O'Connor, Michael | Article in Journal | | 2011 |
| A glimpse of Killarney town during the visit of Queen Victoria, August 1861 | McCarthy, DanielO'Connor, Michael | Article in Journal | | 2013 |
| A guide to tracing your Kerry ancestors | O'Connor, Michael | Monograph or Collective Volume | Flyleaf | 1990 |
| An Leana Mór : from woodland to townland on the Trinity College estate | O'Connor, Michael | Article in Journal | | 1993 |
| Ballinora GAA : under the dropping ball : how the GAA creates belonging in Ballinora | O'Connor, Michael | Monograph or Collective Volume | Ballinora GAA | 2006 |
| Caribbean slave owners & other lesser-known histories from County Mayo | O'Connor, Michael M. | Monograph or Collective Volume | Michael M. O'Connor | 2021 |
| County Mayo. A history of imprisonment, capital punishment & transportation. Part 1. Anatomy of a County Gaol | O'Connor, Michael M. | Monograph or Collective Volume | Michael M. O'Connor | 2020 |
| County Mayo. A history of imprisonment, capital punishment & transportation. Part II. Castlebar prison & the Bridewells of County Mayo, 1835-1935 | O'Connor, Michael M. | Monograph or Collective Volume | Michael M. O'Connor | 2025 |
| Just Billa | O'Connor, Michael | Monograph or Collective Volume | Mercier Press | 2000 |
| Siemens-Schuckert and the electrification of the Irish Free State | O'Beirne, GeraldO'Connor, Michael | Article in Book | | 2002 |
| Siemens-Schuckert and the electrification of the Irish Free State | O'Beirne, GeraldO'Connor, Michael | Article in Book | | 2002 |
| When crowbar & bayonet ruled : the Land War on the Belcarra estate of Harriet Gardiner & Susanna Pringle, 1879-1910 | O'Connor, James R.O'Connor, Michael M. | Monograph or Collective Volume | Original Writing | 2013 |