| A register of trees in Rosscarbery, 1800-1860 | O'Mahony, Michael | Article in Journal | | 2011 |
| Champion of the World | O'Mahony, Michael | Article in Journal | | 1999 |
| Downeen | O'Mahony, Michael | Article in Journal | | 1999 |
| Emmett O'Donovan | O'Mahony, Michael | Article in Journal | | 2007 |
| Glandore Regatta 1848 | O'Mahony, Michael | Article in Journal | | 2014 |
| In Downeen | O'Mahony, Michael | Article in Journal | | 2000 |
| Intermediate education, 1878-1900, with special reference to the operation of the Intermediate Education (Ireland) Act, 1878 | O'Mahony, Michael | Thesis | | 1981 |
| Mick (Mickey) O'Sullivan (1935-2006 | O'Mahony, Michael | Article in Journal | | 2006 |
| Rosscarbery and its origins: [Part one]|Rosscarbery and its origins: Part two|Rosscarbery and its origins: Part three | O'Mahony, Michael | Article in Journal | | 2010 |
| Rosscarbery line - the railway that never was | O'Mahony, Michael | Article in Journal | | 2002 |
| The Fair and its origins | O'Mahony, Michael John | Article in Journal | | 2003 |
| The famine of 1890 | O'Mahony, Michael | Article in Journal | | 2013 |
| The G.A.A. in Rosscarbery | O'Mahony, Michael | Article in Journal | | 1999 |
| The Rosscarbery Steam Engine | O'Mahony, Michael John | Article in Journal | | 2001 |