O'Reilly People with the surname O'Reilly include: •
Alejandro O'Reilly (1722–1794), second Spanish governor of colonial Louisiana •
Andreas O'Reilly (1742–1832), Irish-born Austrian general •
Bernard O'Reilly (1903–1975), Australian author, found the wreck of a Stinson aircraft in the McPherson Range, 1937 •
Bernard O'Reilly (bishop of Hartford) (1803–1856), Irish Roman Catholic bishop •
Bernard O'Reilly (bishop of Liverpool) (1824–1894), Irish Roman Catholic bishop •
Bill O'Reilly (born 1949), American commentator and television show host of
The O'Reilly Factor on the Fox News Channel •
Bill O'Reilly, Australian cricketer •
Bob O'Reilly, Australian rugby league footballer •
Caitriona O'Reilly, Irish poet and critic •
Cal O'Reilly, Canadian ice hockey player •
Cameron O'Reilly, Irish and Australian businessman •
Cassia O'Reilly, Irish singer-songwriter •
Charles O'Reilly (died 1800), Roman Catholic Bishop of Kilmore from 1798 to 1800 •
Danny O'Reilly, lead singer of Irish band, The Coronas •
David O'Reilly, several people •
Dermot O'Reilly (1942–2007), Irish-born Canadian singer and songwriter in band Ryan's Fancy, working in Newfoundland and Labrador •
Des O'Reilly (1954–2016), Australian rugby league player • •
Emily O'Reilly, Irish journalist •
Emma O'Reilly, Irish physiotherapist and cycling soigneur who worked for Lance Armstrong •
Eugenia O'Reilly-Regueiro, Mexican mathematician •
Finbarr O'Reilly, Canadian photographer •
Gary O'Reilly, English footballer •
Genevieve O'Reilly, Irish actress •
Heather O'Reilly (born 1985), American soccer player •
Hugh Reily (1630–1695), Irish M.P. and political author •
James Reilly (Canadian politician) (1835–1909), Canadian businessman and politician from Alberta •
James O'Reilly, American Roman Catholic priest •
Jennifer O'Reilly (1943–2016), medieval historian of Britain and Ireland •
Joe O'Reilly, Irish politician •
John Reyly (recte O'Reilly) (c. 1646–1717), M.P. for Cavan County in the Parliament of Ireland of 1689 •
John B. O'Reilly Jr. (1948–2025), American politician from Michigan •
John O'Reilly (born 1940), Canadian politician from Ontario •
Kyle O'Reilly (born 1987), ring name of Canadian professional wrestler Kyle Greenwood •
Leonora O'Reilly, American feminist •
Luke O'Reilly (disambiguation), several people •
Mary Margaret O'Reilly, assistant director of the United States Bureau of the Mint from 1924 to 1938 •
Matthew O'Reilly, Irish politician and farmer •
Nico O'Reilly, English footballer at Manchester City F.C. •
O'Reilly, Lords of Bréifne (c. 1161–1607), Irish rulers •
Patrick Thomas O'Reilly (1833–1892), US Catholic bishop, born in Ireland •
Peter O'Reilly (civil servant) (1827–1905), Irish-born settler and official in the Colony of British Columbia •
Peter O'Reilly (hurler) (1902–1940), Irish hurler •
Philip O'Reilly (Cavan County MP) (c. 1600–1655), M.P. for County Cavan •
Philip Og O'Reilly (c. 1640–1703), M.P. for Cavan Borough in the Parliament of Ireland of 1689 •
Philip Reyley (recte O'Reilly) (c. 1630 – after 1689), M.P. for Cavan County in the Parliament of Ireland of 1689 •
Randall C. O'Reilly (born 1967), American professor of psychology, developer of
Leabra •
Robert O'Reilly (born 1950), American actor •
Ruth O'Reilly (born 1981), Irish rugby union player •
Ryan O'Reilly (ice hockey) (born 1991), Canadian ice hockey player •
Ryan O'Reilly (wrestler) (born 1980), American professional wrestler •
Sam O'Reilly (born 2006), Canadian ice hockey player •
Samuel O'Reilly (1854–1909), American tattoo artist and inventor • Stephen O'Reilly (born 1964) (better known as
Stephen Egerton), American musician •
Stephen O'Reilly, American actor •
Stephen O'Reilly, Australian footballer •
Terry O'Reilly, Canadian hockey player •
Tim O'Reilly (born 1954), Irish-American founder of O'Reilly Media •
Tom O'Reilly (1915–1995), Irish Gaelic footballer and politician •
Tom O'Reilly, Irish Sinn Féin politician •
Tom O'Reilly, Papua New Guinea international •
Tony O'Reilly (1936–2024), Irish businessman •
Valli O'Reilly, American makeup artist •
Walter Cresswell O'Reilly (1877–1954), Australian Commonwealth Film Censor and founding President of the National Trust of Australia
O'Riley •
Bunny Wailer (1947–2021), Jamaican reggae musician sometimes known as Bunny O'Riley •
Christopher O'Riley (born 1956), American classical pianist and public radio show host •
Don O'Riley (1945–1997), American Major League Baseball pitcher •
Jon Riley (1824–1879), US army deserter also known as John O'Riley •
Matt O'Riley (born 2000), English footballer at Brighton FC
Ní Raghallaigh •
Shónagh Ní Raghallaigh, Irish politician
Riley ==Fictional characters with the surname==