O'Donovan (surname)


 * Military, intelligence
 * Dan "Sandow" O'Donovan (1890—1975), Irish Republican Army figure
 * Donal II O'Donovan (died 1639), the O'Donovan of Clann Cathail, Lord of Clancahill
 * Donal III O'Donovan (died 1660), Irish Confederate Wars
 * Donal IV O'Donovan (died 1705), Williamite War in Ireland
 * Jeremiah O'Donovan (died 1709), O'Donovan of Clanloughlin, Registrar for the Admiralty (Ireland) under James II
 * Jeremiah O'Donovan Rossa (1831—1915), Fenian, Irish Republican Brotherhood figure
 * Jerome X. O'Donovan (1944—2014), US Marine Corps captain, New York City councilman
 * Morgan John Winthrop O'Donovan (1893—1969), O'Donovan of Clancahill
 * Morgan William II O'Donovan (1861—1940), O'Donovan of Clancahill
 * Richard II O'Donovan (died 1829), O'Donovan of Clancahill
 * Seamus O'Donovan (1896–1979), Irish Republican Army figure


 * Government
 * Daniel O'Donovan (MP Doneraile), represented the Manor of Doneraile in James II's Patriot Parliament
 * Denis O'Donovan (born 1955), Irish politician, former Cathaoirleach of Seanad Éireann
 * James O'Donovan, forensic scientist to the Garda Technical Bureau of the Garda Síochána
 * John James O'Donovan, better known as Seán O'Donovan, (1893–1975), Irish Fianna Fáil politician and Veterinarian
 * Patrick O'Donovan, (1977-), Irish Fine Gael politician
 * Reubin Askew (Reubin O'Donovan Askew) (1928-2014), American politician
 * Timothy O'Donovan (1881—1951), Irish politician, Cathaoirleach of Seanad Éireann
 * William O'Donovan (1886—1955), British Conservative Party politician


 * Business & Finance
 * Val O'Donovan (1936—2005), Cork-born Canadian electrical engineer, businessman, co-founder of COM DEV and Chancellor of the University of Waterloo


 * Religion
 * Dennis J. O'Donovan, (d. 1892), American Roman Catholic priest
 * Gerald O'Donovan, (born Jeremiah Donovan; 1871-1942), Irish priest and writer
 * Oliver O'Donovan (born 1945), theologian
 * Prue O'Donovan, Archdeacon of Flinders in the Anglican Diocese of Willochra


 * Academia
 * Leo J. O'Donovan (born 1934), former President of Georgetown University
 * Michael C. O'Donovan, Scottish psychiatric geneticist


 * Sport
 * Ambrose O'Donovan, (1962-), former Gaelic footballer
 * Conor O'Donovan, (1962-), former Irish hurler
 * Darragh O'Donovan, (1995-), Irish hurler
 * Domhnall O'Donovan, (1988-), Irish hurler
 * Fachtna O'Donovan, (1921-1995) Irish Gaelic footballer
 * Gary O'Donovan (1992-), Irish rower
 * John Francis O’Donovan, (1918-1999) Irish chess master
 * Niall O'Donovan, Irish rugby union coach
 * Ollie O'Donovan (b. 1966), Irish rallycross driver
 * Paul O'Donovan, (1994-), Irish rower
 * Roy O'Donovan, (1985-), Irish professional footballer


 * Entertainment
 * Aoife O'Donovan, (1982-), Irish-American singer and songwriter.
 * Frank O'Donovan, (1900–1974), Irish actor, singer and songwriter
 * Maeve O'Donovan (b. 1990), singer-songwriter from Limerick, Ireland
 * Máirín O'Donovan, (1936-), Irish actress, singer, and dancer
 * Noel O'Donovan, (1949-2019), Irish actor
 * Ross O'Donovan (born 1987), animator and co-host of YouTube webseries, Steam Train


 * Fictional
 * Liam O'Donovan (Tracy Beaker Returns), Tracy Beaker character


 * Other
 * Barra Ó Donnabháin (1941—2003), Irish language columnist, The Irish Echo
 * Brian O'Donovan, (1980-), Irish journalist
 * Daniel O'Donovan of Mahoonagh and Feenagh, was the hereditary chief of the remnants of the Ui- Donnabhain of the Uí Fidgenti,
 * Edwin O'Donovan (1914-2000), American art director
 * Fred O'Donovan (theatre producer) (1930–2010), Irish theatre producer and businessman
 * Fred O'Donovan (actor) (1884–1952), Irish actor, film maker and theatre manager
 * Gerard O'Donovan, (1958-), Irish author
 * Gerald O'Donovan (1871—1972), writer
 * Ímar Ua Donnubáin, or Ivor O'Donovan, a legendary and celebrated petty king, navigator, trader, and reputed necromancer of 13th century Ireland
 * Mary Jane O'Donovan Rossa, (1845-1916), Irish poet and political activist
 * Michael Francis O'Donovan (1903—1966), Irish author Frank O'Connor
 * William Rudolf O'Donovan (1844—1920), American sculptor