John O'Leary

John O'Leary may refer to:

Arts and entertainment

 * John O'Leary (journalist), editor of the Times Higher Education Supplement
 * John O'Leary (actor), (1926–2019), American actor in My Chauffeur
 * John O'Leary (blues harmonica artist), British blues harmonica player, originally with the band Savoy Brown

Government and politics

 * John O'Leary (ambassador) (1947–2005), U.S. ambassador to Chile
 * John O'Leary (Fenian) (1830–1907), Irish nationalist who was imprisoned in England
 * John O'Leary (Kerry politician) (1933–2015), Irish Fianna Fáil party politician and TD for Kerry South
 * John O'Leary (Wexford politician) (1894–1959), Irish Labour party politician and TD for Wexford
 * John F. O'Leary (1926–1987), U.S. head of Federal Energy Administration

Sports

 * John O'Leary (Canadian football) (born 1954), Canadian football running back
 * John O'Leary (Gaelic footballer) (born 1961), Irish Gaelic footballer
 * John O'Leary (golfer) (1949–2020), Irish golfer
 * John O'Leary (sport shooter) (1880–?), British Olympic sport shooter
 * Jack O'Leary (c. 1929–1983), American football and basketball coach, college athletics administrator