| Annales Buelliani (from the creation to 1253 or 1257) | | Article in Book | | 1825 |
| Bibliotheca MS. Stowensis. A descriptive catalogue of the manuscripts in the Stowe library. Vol. 1. | | Monograph or Collective Volume | | 1818 |
| Dissertations on the history of Ireland | O'Conor, Charles | Monograph or Collective Volume | | 1746 |
| Letters of Charles O'Conor of Belanagare : a Catholic voice in eighteenth-century Ireland | O'Conor, CharlesWard, Catherine CooganWrynn, John F | Monograph or Collective Volume | Catholic University of America Press | 1988 |
| Memoirs of the life and writings of the late Charles O'Conor of Belanagare | O'Conor, Charles | Monograph or Collective Volume | [s.n.] | 1796 |
| Rerum Hibernicarum scriptores veteres. 4 vols | O'Conor, Charles | Monograph or Collective Volume | | 1814 |
| The beginnings of Irish Catholic organisation in the eighteenth century | O'Conor, Charles | Article in Journal | | 1943 |
| The case of the Roman Catholics of Ireland | [O'Conor, Charles] | Monograph or Collective Volume | | 1755 |
| The Ogygia vindicated ... | O'Conor, CharlesO'Flaherty, Roderick | Monograph or Collective Volume | | 1775 |
| The sodality of Our Lady in Ireland in the nineteenth century | O'Conor, Charles | Article in Journal | | 1945 |