| A pocket history of the IRA | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 1997 |
| Amateur drama in Athlone : some early records | O'Brien, Brendan | Article in Book | | 1980 |
| Athlone : an historical study | O'Brien, Brendan | Article in Journal | | 1952 |
| Athlone workhouse and the famine | O'Brien, BrendanO'Brien, Gearoid | Monograph or Collective Volume | The Old Athlone Society | 1995 |
| Athlone's repeal demonstration | O'Brien, Brendan | Article in Journal | | 1971 |
| Earliest memories of the theatre in Athlone | O'Brien, Brendan | Article in Journal | | 1969 |
| Early days of the garrison theatre in Athlone | O'Brien, Brendan | Article in Journal | | 1975 |
| O' Brien pocket history of the IRA : from 1916 onwards | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 2007 |
| Some aspects of municipal government in Athlone | O'Brien, Brendan | Article in Book | | 1991 |
| The long war : the IRA and Sinn Féin from armed struggle to peace talks | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 1995 |
| The long war : the IRA and Sinn Féin, 1985 to today | O'Brien, Brendan | Monograph or Collective Volume | O'Brien Press | 1993 |
| The Tholsel of Athlone | O'Brien, Brendan | Article in Journal | | 1973 |
| They once trod the boards in Athlone | O'Brien, Brendan | Article in Journal | | 1978 |
| When the circus came to Athlone | O'Brien, Brendan | Article in Journal | | 1985 |
| William Smith O'Brien, 6th October 1803 - 18th June 1864 | O'Brien, Brendan | Article in Journal | | 1998 |