| 'Cath Maige Tuired' as exemplary myth | Ó Cathasaigh, Tomás | Article in Book | Cork University Press | 1983 |
| 'The expulsion of the Déisi' | Ó Cathasaigh, Tomás | Article in Journal | | 2005 |
| Anders Ahlqvist (1945-2018) | Ó Cathasaigh, Tomás | Article in Journal | | 2019 |
| Coire sois, The cauldron of knowledge : a companion to early Irish saga | Ó Cathasaigh, Tomás | Monograph or Collective Volume | University of Notre Dame | 2014 |
| Curse and satire | Ó Cathasaigh, Tomás | Article in Journal | | 1986 |
| Dubthach’s laíd in Táin bó Cúailnge | Ó Cathasaigh, Tomás | Article in Book | | 2019 |
| Early Irish narrative literature | Ó Cathasaigh, Tomás | Article in Book | | 1996 |
| King, hero and hospitaller in 'Aided Cheltchair Maic Uthechair' | Ó Cathasaigh, Tomás | Article in Book | | 2010 |
| Kingship in early Irish literature | Ó Cathasaigh, Tomás | Article in Book | | 2010 |
| On the Cín Dromna Snechta version of Togail Brudne Uí Dergae | Ó Cathasaigh, Tomás | Article in Journal | | 1990 |
| On the genealogical preamble to 'Vita Sancti Declani' | Ó Cathasaigh, Tomás | Article in Book | | 2015 |
| On the LU version of 'the expulsion of the Dési' | Ó Cathasaigh, Tomás | Article in Journal | | 1976 |
| Pagan survivals : the evidence of early Irish narrative | Ó Cathasaigh, Tomás | Article in Book | | 1984 |
| The body in Táin bó Cúailnge. | Ó Cathasaigh, Tomás | Article in Book | | 2013 |
| The concept of the hero in Irish mythology | Ó Cathasaigh, Tomás | Article in Book | | 1985 |
| The Déisi and Dyfed | Ó Cathasaigh, Tomás | Article in Journal | | 1984 |
| The heroic biography of Cormac mac Airt | Ó Cathasaigh, Tomás | Monograph or Collective Volume | School of Celtic Studies. Dublin Institute for Advanced Studies | 1977 |
| The literature of medieval Ireland to c. 800 : St. Patrick to the Vikings | Ó Cathasaigh, Tomás | Article in Book | | 2006 |
| The oldest story of the Laigin : observations on 'Orgain Denna Ríg' | Ó Cathasaigh, Tomás | Article in Journal | | 2002 |
| The rhetoric of 'Scéla Cano meic Gartnáin' | Ó Cathasaigh, Tomás | Article in Book | | 1989 |
| The semantics of 'sid' | Ó Cathasaigh, Tomás | Article in Journal | | 1977 |
| The sister's son in early Irish literature | Ó Cathasaigh, Tomás | Article in Journal | | 1986 |
| The theme of 'ainmne' in 'Scéla' Cano Meic Gartnáin' | Ó Cathasaigh, Tomás | Article in Journal | | 1983 |
| The theme of 'Iommrad' in 'Cath Maige Mucrama' | Ó Cathasaigh, Tomás | Article in Journal | | 1981 |
| Three notes on 'Cath Maige Tuired' | Ó Cathasaigh, Tomás | Article in Journal | | 1989 |
| Tóraíocht Dhiarmada agus Ghráinne | Ó Cathasaigh, Tomás | Article in Book | | 1995 |
| Varia III. The trial of Mael Fhothartaig | Ó Cathasaigh, Tomás | Article in Journal | | 1985 |