| "New heresy for old" : Pelagianism in Ireland and the papal letter of 640 | Ó Cróinín, Dáibhí | Article in Journal | | 1985 |
| 'I don't want the word of God in Irish. I want the word of Canon O'Leary!': An tAthair Peadar Ó Laoghaire and his Irish translation of the Bible | Ó Cróinín, Dáibhí | Article in Journal | | 2023 |
| A miracle of learning : studies in manuscripts and Irish learning. Essays in honour of William O'Sullivan | | Monograph or Collective Volume | Ashgate | 1998 |
| A new history of Ireland 1 : prehistoric and early Ireland | | Monograph or Collective Volume | Oxford University Press | 2005 |
| A new seventh-century Irish commentary on Genesis | Ó Cróinín, Dáibhí | Article in Journal | | 2001 |
| A poem to Toirdhealbhach Luinneach Ó Néill | Ó Cróinín, Dáibhí | Article in Journal | | 1975 |
| A seventh century Irish computus from the circle of Cummianus | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| A seventh-century Irish computus from the circle of Commianus | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| A tale of two rules : Benedict and Columbanus | Ó Cróinín, Dáibhí | Article in Book | | 2005 |
| An Eruigenian miscellany in a Munich manuscript? | Ó Cróinín, Dáibhí | Article in Journal | | 2002 |
| An Old-Irish gloss in the Munich computus | Ó Cróinín, Dáibhí | Article in Journal | | 1981 |
| Archbishop James Ussher (1581–1656) and the history of the Easter controversy | Ó Cróinín, Dáibhí | Article in Book | | 2017 |
| Bernard Bischoff (1906-1991) : a memoir | Ó Cróinín, Dáibhí | Article in Journal | | 1996 |
| Bibliography | Byrne, Francis John, 1934-Harbison, PeterÓ Cróinín, Dáibhí | Article in Book | | 2005 |
| Bilingual Old Irish and Old Welsh Glosses in a Ninth-Century Gotha MS of Isidore's 'Etymologiae' | Ó Cróinín, Dáibhí | Article in Journal | | 2022 |
| Bischoff's Wendepunkte fifty years on | Ó Cróinín, Dáibhí | Article in Journal | | 2000 |
| Clonmelsh (Rath Melsigi), Willibrond, and the origins of the Irish dance | Ó Cróinín, Dáibhí | Article in Journal | | 1996 |
| Columbanus, the computistical writings | Ó Cróinín, Dáibhí | Article in Book | | 1997 |
| Computus and its cultural context in the Latin west, AD 300-1200. Proceedings of the 1st international conference on the science of computus in Ireland and Europe, Galway 14-16 July, 2006 | | Monograph or Collective Volume | Brepols | 2010 |
| Cummianus Longus and the iconography of Christ and the apostles in early Irish literature | Ó Cróinín, Dáibhí | Article in Book | | 1989 |
| Dán Áráis, 1654 | Ó Cróinín, Dáibhí | Article in Book | | 2013 |
| Donatus. Finit amen | Ó Cróinín, Dáibhí | Article in Journal | | 1983 |
| Early Irish annals from Easter-tables : a case restated | Ó Cróinín, Dáibhí | Article in Journal | | 1983 |
| Early Irish history and chronology | Ó Cróinín, Dáibhí | Monograph or Collective Volume | Four Courts | 2003 |
| Early medieval Ireland, 400-1200 | Ó Cróinín, Dáibhí | Monograph or Collective Volume | Routledge | 2017 |
| Early medieval Ireland, 400-1200 | Ó Cróinín, Dáibhí | Monograph or Collective Volume | Longman | 1995 |
| Eoin MacNeill : the scholar and his critics | Ó Cróinín, Dáibhí | Article in Book | | 2022 |
| Eól dam seiser cloinne Cuinn: the fortunes of a twelfth-century Irish syncretistic poem | Ó Cróinín, Dáibhí | Article in Book | | 2013 |
| Hiberno-Latin 'calcenterus' | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| Hiberno-Latin literature to 1169 | Ó Cróinín, Dáibhí | Article in Book | | 2005 |
| Introduction | Ó Cróinín, Dáibhí | Article in Book | | 2025 |
| Ireland, 400-800 | Ó Cróinín, Dáibhí | Article in Book | | 2005 |
| Irland und St.Gallen|Ireland and St Gall | Ó Cróinín, Dáibhí | Article in Book | | 2018 |
| James F. Kenney on early Irish history as a field of research by American students | Ó Cróinín, Dáibhí | Article in Journal | | 2015 |
| Late Antique Calendrical Thought and Its reception in the Early Middle Ages: Proceedings from the Third International Conference on the Science of Computus in Ireland and Europe, Galway, 16-18 July, 2010 | | Monograph or Collective Volume | Brepols Publishers | 2017 |
| Latin palaeography : antiquity and the middle ages | Bischoff, BernhardÓ Cróinín, Dáibhí | Monograph or Collective Volume | Cambridge University Press | 1990 |
| Lebar buide Meic Murchada | Ó Cróinín, Dáibhí | Article in Book | | 1998 |
| Letters of Kuno Mayer to Douglas Hyde, 1896-1919 | Ó Cróinín, Dáibhí | Article in Journal | | 2016 |
| Merovingian politics and insular calligraphy : the historical background to the Book of Durrow and related manuscripts | Ó Cróinín, Dáibhí | Article in Book | | 1987 |
| Mó-Sinnu moccu Min and the computus of Bangor | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| Mute stones with much to say : a review article | Ó Cróinín, Dáibhí | Article in Journal | | 1995 |
| Na mainistreacha agus an léann | Ó Cróinín, Dáibhí | Article in Book | | 1982 |
| New light on Palladius | Ó Cróinín, Dáibhí | Article in Journal | | 1986 |
| Notes. Irish prayers in a Zürich Codex of the 'Ars Prisciani' | Ó Cróinín, Dáibhí | Article in Journal | | 2015 |
| Pride and prejudice | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| Rath Melsigi, Willibrord and the earliest Echternach manuscripts | Ó Cróinín, Dáibhí | Article in Journal | | 1984 |
| Re-discovering St. Willibrord, Patron Saint of Luxembourg, first apostle of the Netherlands and his County Carlow connection : Carlow's impact on Medieval Europe | Kauthen, PierrreMulligan, DermotÓ Cróinín, Dáibhí | Monograph or Collective Volume | Carlow County Council | 2018 |
| Review article. The earliest Irish and English books: time for a reappraisal | Ó Cróinín, Dáibhí | Article in Journal | | 2017 |
| Review article: A 'pioneer of nations': Ireland's earliest writers | Ó Cróinín, Dáibhí | Article in Journal | | 2014 |
| Saint Patrick | Ó Cróinín, Dáibhí | Article in Book | | 2001 |
| Saints, scholars and science in early medieval Ireland | Ó Cróinín, Dáibhí | Article in Book | | 2013 |
| Sex aetates mundi: text, translation and commentary | Ó Cróinin, Dáibhi | Thesis | | 1977 |
| Strange goings-on in Roscrea, 1477 and 1995 | Ó Cróinín, Dáibhí | Article in Book | | 2012 |
| Tagebuch eines Iren | Ó Cróinín, Dáibhi | Article in Journal | | 2007 |
| The "lost" Irish 84-year Easter table rediscovered | Mc Carthy, Daniel P., 1945-Ó Cróinín, Dáibhí | Article in Journal | | 1990 |
| The Big Book : 'Clavis litterarum Hibernensium' Medieval Irish books & texts (c.400-c.1600). 3 vols; edited by Donnchadh Ó Corráin [Review article] | Ó Cróinín, Dáibhí | Article in Journal | | 2019 |
| The Book of Kells and the Corbie Psalter (with a note on Harley 2788) | Meehan, BernardMurchada, Lebar Buide MeicÓ Cróinín, Dáibhí | Article in Book | | 1998 |
| The Cathach and Domnach Airgid | Ó Cróinín, Dáibhí | Article in Book | | 2009 |
| The continuity of Irish computistical tradition | Ó Cróinín, Dáibhí | Article in Book | | 2010 |
| The earliest Echternach liturgical manuscript fragments : Irish or Anglo-Saxon? | Ó Cróinín, Dáibhí | Article in Book | | 2017 |
| The Easter Controversy of late antiquity and the early middle ages : its manuscripts, texts and tables. Proceedings of the 2nd international conference on the science of computus in Ireland and Europe. Galway, 18-20 July, 2008 | | Monograph or Collective Volume | Brepols | 2011 |
| The history of an Irish book | Ó Cróinín, Dáibhí | Article in Book | | 2015 |
| The Irish 'Sex Aetates Mundi' | Ó Cróinín, Dáibhí | Monograph or Collective Volume | [s.n.] | 1982 |
| The Irish abroad in medieval Europe | Ó Cróinín, Dáibhí | Article in Journal | | 1986 |
| The Irish as mediators of antique culture on the Continent | Ó Cróinín, Dáibhí | Article in Book | | 1993 |
| The Irish mission | Ó Cróinín, Dáibhí | Article in Book | | 1991 |
| The Irish provenance of Bede's computus | Ó Cróinín, Dáibhí | Article in Journal | | 1983 |
| The oldest Irish names for the days of the week? | Ó Cróinín, Dáibhí | Article in Journal | | 1981 |
| The songs of Elizabeth Cronin, Irish traditional singer : the complete song collection | Cronin, Elizabeth M.Ó Cróinín, Dáibhí | Monograph or Collective Volume | Four Courts | 2000 |
| Three weddings and a funeral : rewriting Irish political history in the tenth century | Ó Cróinín, Dáibhí | Article in Book | | 2000 |
| Whitley Stokes (1830-1909) : the lost Celtic notebooks rediscovered | Ó Cróinín, Dáibhí | Monograph or Collective Volume | Four Courts | 2011 |
| Who was Palladius, "first bishop of the Irish"? | Ó Cróinín, Dáibhí | Article in Journal | | 2000 |
| William O'Sullivan : four appreciations | Barnard, T. C. (Toby Christopher)Hickey, ElizabethSimms, KatharineÓ Cróinín, Dáibhí | Article in Book | | 1998 |
| Willibrord und die frühe angelsächsische Missionierung Kontinentaleuropas | Ó Cróinín, Dáibhí | Article in Book | | 2013 |
| Writing | Ó Cróinín, Dáibhí | Article in Book | | 2003 |