| 'An honour to the nation' : publishing John O'Donovan's edition of the Annals of the Four Masters 1848-56 | Cunningham, Bernadette | Article in Book | Woodfield | 2006 |
| An Accomplished Man: A Biography of Robert Donovan – Journalist, Academic and Political Activist | | Monograph or Collective Volume | John O'Donovan | 2020 |
| An unwonted toponymical error by John O'Donovan | Ó Muraíle, Nollaig | Article in Journal | | 2010 |
| Annála ríoghachta Éireann : Annals of the Kingdom of Ireland, by the four masters, from the earliest period to 1616. 7 vols. | | Monograph or Collective Volume | Hodges & Smith | 1851 |
| Bernard MacMahon of Ballybay | Ó Mórdha, Pilib | Article in Journal | | 1963 |
| Docwra's Derry : a narration of events in North-west Ulster, 1600-1604 | Docwra, Henry, 1st Baron Docwra of Culmore, bap. 1564, d. 1631 | Monograph or Collective Volume | Ulster Historical Foundation | 2003 |
| Eugene O'Curry's early life : details from the unpublished letter | Herity, Michael | Article in Journal | | 1967 |
| Father John O'Donovan. Catholic adviser and chief of religious and cultural resources to General Douglas McArthur 1948-1951 | Harte, Nuala | Article in Journal | | 2004 |
| John O'Donovan "Our greatest man of learning" | O'Donovan, Peadar | Article in Journal | | 1997 |
| John O'Donovan (1806-1861) : a biography | Boyne, Patricia | Monograph or Collective Volume | | 1987 |
| John O'Donovan - Commissioner of New Zealand Police | O'Sullivan, Donal J. | Article in Journal | | 2010 |
| John O'Donovan and 'The Annals of the Four Masters' | Concannon, Helena | Article in Journal | | 1948 |
| John O'Donovan and 'The night of the big wind' | Mehigan, P. D. | Article in Journal | | 1945 |
| John O'Donovan and Colonel Larcom | Ó Lochlainn, Colm, 1892-1972 | Article in Journal | | 1945 |
| John O'Donovan and Dr. Todd | Ó Lochlainn, Colm, 1892-1972 | Article in Journal | | 1940 |
| John O'Donovan and the Annals | Ó Lochlainn, Colm, 1892-1972 | Article in Journal | | 1940 |
| John O'Donovan and the development of Celtic studies | Daly, Mary E. | Article in Book | | 2008 |
| John O'Donovan and the field named 'Gaul's Garden' on the ordnance map | Cody, Eamon | Article in Journal | | 1997 |
| John O'Donovan and the Four Masters | Ó Lochlainn, Colm, 1892-1972 | Article in Journal | | 1943 |
| John O'Donovan and the framing of early medieval Ireland in the nineteenth century | Swift, Catherine | Article in Journal | | 1994 |
| John O'Donovan and the Ordnance Survey | Smith, Gilian | Article in Book | | 2001 |
| John O'Donovan and Thomas le Keu: preliminary comments on processes af Anglicisation in Irish surnames | Swift, Catherine | Article in Journal | | 2015 |
| John O'Donovan of the Ordnance Survey at the Moat of Granard May 1837 | Herity, Michael | Article in Journal | | 2008 |
| John O'Donovan on place names | McGinn, Brendan | Article in Journal | | 1979 |
| John O'Donovan visits Magherlin | Malcomson, Tom | Article in Journal | | 1979 |
| John O'Donovan's Curragh | Costello, Con | Article in Book | | 2006 |
| John O'Donovan's edition of the Annals of the Four Masters (1848-51) | Ó Muraíle, Nollaig | Article in Book | | 2025 |
| John O'Donovan's edition of the Annals of the Four Masters : an Irish classic? | Cunningham, Bernadette | Article in Journal | | 2008 |
| John O'Donovan's edition of The annals of the kingdom of Ireland by the Four Masters | McGuinne, Dermot | Article in Book | | 2011 |
| John O'Donovan's family | Ó Lochlainn, Colm, 1892-1972 | Article in Journal | | 1940 |
| John O'Donovan's last illness | Herity, Michael | Article in Journal | | 2007 |
| John O'Donovan's letters from County Fermanagh (1834) : letters containing information relative to the antiquities and families and places collected during the ordnance survey in 1834 | O'Donovan, John, 1806-1861 | Monograph or Collective Volume | St Davog's Press | 1993 |
| John O'Donovan's letters from county Londonderry (1834) : letters containing information relative to the antiquities of the county Londonderry collected during the progress of the Ordnance Survey | O'Donovan, John, 1806-1861 | Monograph or Collective Volume | Ballinascreen Historical Society | 1992 |
| John O'Donovan's work on the ordnance survey | Tracy, Alice | Article in Journal | | 1964 |
| John O'Donovan, the man and the scholar | Walsh, Richard B. | Article in Book | | 1986 |
| Letters from Francis Drew to John O'Donovan 1861 | Herity, Michael | Article in Journal | | 2006 |
| Letters from the county Down : John O'Donovan's first field work for the Ordnance Survey | Boyne, Patricia | Article in Journal | | 1984 |
| New letters from James Clarence Mangan to John O'Donovan | Shannon-Mangan, Ellen | Article in Journal | | 1988 |
| O'Kief, Coshe Mang, Slieve Lougher and Upper Blackwater in Ireland. Vol 9 : historical and genealogical items relating to north Cork and east Kerry, Annals of the Kingdom of Ireland by the Four Masters | | Monograph or Collective Volume | Public Record Office | 1966 |
| Poem on the battle of Dun, 1260 | Mac Con Midhe, Giolla Brighde | Article in Book | | 1849 |
| Priests, pagans and place-names | Falvey, Anne | Article in Journal | | 1997 |
| Sean O'Donovan | Heylin, Frank | Article in Journal | | 1987 |
| Some letters of Dr. John O'Donovan | O'Donovan, John, 1806-1861
| Article in Journal | | 1940 |
| Some letters of John O'Donovan | | Article in Journal | | 1944 |
| Some ordnance survey letters of Dr. John O'Donovan | | Article in Journal | | 1939 |
| The 'lost' letters of John O'Donovan | O'Donovan, John | Article in Book | | 2001 |
| The letters of John O'Donovan in County Fermanagh : dogs, turkeycocks and ganders | Cunningham, John B. 1944- | Article in Journal | | 1992 |
| The Martyrology of Donegal : a calendar of the saints of Ireland | | Monograph or Collective Volume | Irish Archaeological & Celtic Society | 1864 |
| The topographical poems of John O'Dubhagain and Giolla na naomh Ó hUidhrin | | Monograph or Collective Volume | Irish Archaeological and Celtic Society | 1862 |
| Two letters of John O'Donovan | O'Donovan, John, 1806-1861 | Article in Journal | | 1954 |
| Whitley Stokes's correspondence with John O'Donovan, 1857-1861 | Herity, Michael | Article in Journal | | 2010 |