| A comment on Fr. Aubrey Gwynn's 'The medieval province of Armagh' | Ó Ceallaigh, Séamus | Article in Journal | | 1953 |
| An Chlosach | Ó Ceallaigh, Séamus | Article in Journal | | 1998 |
| Gaelic athletic memories | Ó Ceallaigh, Séamus | Monograph or Collective Volume | Gaelic Athletic Publications | 1945 |
| Gleanings from Ulster history | Mawhinney, GrahamWhitfield, NiamhÓ Ceallaigh, SéamusÓ Muraíle, Nollaig | Monograph or Collective Volume | Ballinascreen Historical Society | 1994 |
| Gleanings from Ulster history : punann ó chios bhanna | Ó Ceallaigh, Séamus | Monograph or Collective Volume | University P. | 1951 |
| Notes on place names in Derry and Tyrone | Ó Ceallaigh, Séamus | Article in Journal | | 1946 |
| Old lights on place-names : new lights on maps | Ó Ceallaigh, Séamus | Article in Journal | | 1950 |
| Queries and suggestions : 1. Ard Macha Bréige, 2. Kilcorway, 3. MacArtisfort : Ballymacarret | Ó Ceallaigh, Séamus | Article in Journal | | 1998 |
| Story of the GAA : history and book of reference for Gaels | Ó Ceallaigh, Séamus | Monograph or Collective Volume | Gaelic Athletic Publications | 1977 |
| Territorial nomenclature between the Bann and Foyle | Ó Ceallaigh, Séamus | Article in Journal | | 1998 |
| The northern boundary of the archdiocese of Armagh | Ó Ceallaigh, Séamus | Article in Journal | | 1954 |