| A Hiberno-Scottish family (Ó Muirgheasáin, Morrison) | O'Rahilly, T. F. | Article in Journal | | 1942 |
| A poem by Piaras Feiritéar | | Article in Journal | | 1942 |
| Cairbre Cattchenn | O'Rahilly, T. F. | Article in Book | | 1995 |
| Cúan Ua Lothcháin and Corcrán Clérech | O'Rahilly, T. F. | Article in Journal | | 1950 |
| Dánfhocail : Irish epigrams | | Monograph or Collective Volume | | 1921 |
| Dánta grádha | O'Rahilly, T. F. | Monograph or Collective Volume | | 1916 |
| Dánta Grádha : an anthology of Irish love poetry, A.D. 1350-1750. Pt. 1 : Text | | Monograph or Collective Volume | | 1916 |
| Early Irish history and mythology | O'Rahilly, T. F. | Monograph or Collective Volume | Institute for Advanced Studies | 1946 |
| Early Irish history and mythology | O'Rahilly, T. F. | Monograph or Collective Volume | | 1957 |
| Irish dialects past and present, with chapters on Scottish and Manx | O'Rahilly, T. F. | Monograph or Collective Volume | | 1932 |
| Irish poets, historians, and judges in English documents, 1538-1615 | | Article in Journal | | 1921 |
| Irish scholars in Dublin in the early eighteenth century | | Article in Journal | | 1912 |
| Literary forgeries in Irish | O'Rahilly, T. F. | Article in Journal | | 1941 |
| Measgra dánta : miscellaneous Irish poems | O'Rahilly, T. F. | Monograph or Collective Volume | | 1927 |
| Notes on early Irish history and mythology | O'Rahilly, T. F. | Article in Journal | | 1950 |
| Notes on Irish place-names | O'Rahilly, T. F. | Article in Journal | | 1933 |
| On the origin of the names Érainn and Ériu | O'Rahilly, T. F. | Article in Journal | | 1946 |
| Some Fermoy placenames | O'Rahilly, T. F. | Article in Journal | | 1938 |
| The Goidels and their predecessors | O'Rahilly, T. F. | Article in Journal | | 1936 |
| The history of the Stowe Missal | O'Rahilly, T. F. | Article in Journal | | 1928 |
| The Irish name of Mallow | O'Rahilly, T. F. | Article in Journal | | 1938 |
| The O'Byrnes of Baile na Coille | O'Rahilly, T. F. | Article in Journal | | 1938 |
| The two Patricks : a lecture on the history of Christianity in 5th century Ireland | O'Rahilly, T. F. | Monograph or Collective Volume | Institute for Advanced Studies | 1942 |
| Tomás Ó Dúnlaing and Seán Ó Braonáin | O'Rahilly, T. F. | Article in Journal | | 1950 |
| Varia ii - 2, Ó Gnímh's alleged visit to London ; 25, Lost legends of Mis and Dubh Ruis | O'Rahilly, T. F. | Article in Journal | | 1950 |