| A guide to early Irish Law | Kelly, Fergus | Monograph or Collective Volume | Dublin Institute for Advanced Studies | 1988 |
| A note on Old Irish círmaire | Kelly, Fergus | Article in Journal | | 1990 |
| A poem in praise of Columb Cille | Kelly, Fergus | Article in Journal | | 1973 |
| An early Irish category of swindler : the 'mindach méith' | Kelly, Fergus | Article in Book | | 2015 |
| An Old-Irish text on court procedure | Kelly, Fergus | Article in Journal | | 1986 |
| Bechbretha, an old Irish law-tract on bee-keeping | NA | Monograph or Collective Volume | Dublin Institute for Advanced Studies | 1983 |
| Below ground: a study of early Irish pits and souterrains | Kelly, Fergus | Article in Book | | 2016 |
| Cauldron imagery in a legal passage on judges (CIH IV 1307.38-1308.7) | Kelly, Fergus | Article in Journal | | 2010 |
| Dance in pre-Norman Ireland | Kelly, Fergus | Article in Book | | 2019 |
| Early Irish farming : a study based mainly on the law-texts of the 7th and 8th centuries AD | Kelly, Fergus | Monograph or Collective Volume | School of Celtic Studies, Dublin Institute for Advanced Studies | 1997 |
| Early Irish law : the present state of research | Kelly, Fergus | Article in Journal | | 1992 |
| Giolla ne Naomh Mac Aodhagáin : a thirteenth-century legal innovator | Kelly, Fergus | Article in Book | | 2001 |
| Irish bardic poetry | | Monograph or Collective Volume | [s.n.] | 1970 |
| Irish bardic poetry : texts and translations together with an introductory lecture by Osborn Bergin | | Monograph or Collective Volume | | 1970 |
| Marriage disputes : a fragmentary Old Irish law text | | Monograph or Collective Volume | Dublin Institute for Advanced Studies | 2014 |
| Myles Dillon : scholar, organiser, innovator | Kelly, Fergus | Article in Book | | 2013 |
| Obituary. Brian Ó Cúiv (1916-99) | Kelly, Fergus | Article in Journal | | 2004 |
| Rolf Baumgarten (1936-2012) | Kelly, Fergus | Article in Journal | | 2013 |
| Texts and transmissions : the law-texts | Kelly, Fergus | Article in Book | | 2002 |
| The beliefs and mythology of the early Irish, with special reference to the Cosmos | Kelly, Fergus | Article in Book | | 2001 |
| The Irish Adam and Eve story from Saltair na Rann | Greene, DavidKelly, Fergus | Monograph or Collective Volume | [s.n.] | 1976 |
| The life and work of Oisín Kelly | Kelly, Fergus S. | Monograph or Collective Volume | Dereen Books | 2015 |
| The life and work of Oisin Kelly | Kelly, Fergus S. | Monograph or Collective Volume | Derreen Books | 2015 |
| The life and work of Oisin Kelly | Kelly, Fergus | Article in Journal | | 1989 |
| The MacEgan Legal Treatise:: an early modern Irish law-text by Giolla na Naomh Mac Aodhaga´in(+1309) | Mac Aodhagáin, Giolla na Naomh -1309 | Monograph or Collective Volume | School of Celtic Studies, Dublin Institute for Advanced Studies, | 2020 |
| The Old Irish tree-list | Kelly, Fergus | Article in Journal | | 1976 |
| The Patrician texts in the Book of Armagh | | Monograph or Collective Volume | Institute for Advanced Studies | 1979 |
| The recovery of stolen property : notes on legal procedure in Gaelic Ireland, Scotland and the Isle of Man | Kelly, Fergus | Article in Book | | 2011 |
| The relative importance of cereals and livestock in the medieval Irish economy : the evidence of the law-texts | Kelly, Fergus | Article in Book | | 2010 |
| Thinking in Threes : The Triad in Early Irish Literature | Kelly, Fergus | Article in Journal | | 2004 |
| Tiughraind Bhécáin | Kelly, Fergus | Article in Journal | | 1975 |
| Trees in early Ireland | Kelly, Fergus | Article in Journal | | 1999 |
| Two notes on final-verb constructions | Kelly, Fergus | Article in Journal | | 1986 |
| Varia III : Old Irish creccaire, Scottish Gaelic kreahkir | Kelly, Fergus | Article in Journal | | 1986 |
| Water-rights and milling in early Irish law | Kelly, Fergus | Article in Journal | | 2003 |
| Whodunnit? indirect evidence in early Irish Law | Kelly, Fergus | Article in Journal | | 2015 |