| Clonamery | Brennan, John | Article in Journal | | 1976 |
| Foulksrath and its associations | Brennan, John | Article in Journal | | 1978 |
| Ireland and crisis governance : continuity and change in the shadow of the financial crisis and Brexit | Murphy, Mary C.O'Brennan, John | Article in Journal | | 2019 |
| Jenkinstown - Co. Kilkenny and its associations | Brennan, John | Article in Journal | | 1981 |
| Jenkinstown oratory | Brennan, John | Article in Journal | | 1993 |
| The dual crisis in Irish foreign policy : the economic crash and Brexit in a volatile European landscape | O'Brennan, JohnRees, Nicholas | Article in Journal | | 2019 |
| The Duffy publishing family | Brennan, John | Article in Journal | | 2013 |
| The Years Flew By : The Recollections of Madame Sidney Gifford Czira | Brennan, JohnCzira, Sidney Gifford | Monograph or Collective Volume | Arlen House | 2000 |
| Tom Moore and George Bryan, Jenkinstown | Brennan, John | Article in Journal | | 1989 |
| Tullamaine, Newton and Mallardstown : history and heritage | Brennan, John | Monograph or Collective Volume | Callan Heritage Society | 2001 |