John O'Connor may refer to:
Clergy John O'Connor (Archdeacon of Emly) ( 1854–1904), Archdeacon of Emly, 1880–1904 John J. O'Connor (bishop of Newark) (1855–1927), Roman Catholic Bishop of Newark John O'Connor (priest) (1870–1952), British Roman Catholic priest, model for the fictional detective Father Brown John O'Connor (cardinal) (1920–2000), Roman Catholic Archbishop of New York
Politicians John O'Connor (Australian politician) (1878–1937), Australian politician from South Australia John O'Connor (Canadian politician) (1824–1887), Canadian politician from Ontario John O'Connor (Irish Parliamentary Party politician) ( 1835–1891), Lord Mayor of Dublin and MP for South Kerry John O'Connor (North Kildare MP) (1850–1928), Irish politician John J. O'Connor (congressman) (1885–1960), American politician from New York John J. O'Connor (New Hampshire politician), American politician from New Hampshire John J. O'Connor (New York state legislator) (1855–1898), American politician from New York John M. O'Connor (born 1954), American politician from Oklahoma John S. O'Connor (1896–1967), Irish politician John T. O'Connor, American politician from New Hampshire
Sportspeople John O'Connor (English cricketer) (1867–1936) John O'Connor (Australian cricketer) (1868–1952) John O'Connor (Cork hurler) ( 1890s) John O'Connor (triple jumper) (1893–1977), Irish Olympic athlete John C. O'Connor (1878–1922), American college football coach Johnny O'Connor (baseball) (1891–1982), Major League Baseball player Johnny O'Connor (hurler) (1928–2010), Irish hurler who played for Waterford John O'Connor (Wexford hurler) (born 1965), Irish hurler who played for Wexford Johnny O'Connor (born 1980), Irish rugby union player
Others John O'Connor (musician) (born 1949), British guitarist, television composer and recording artist John O'Connor (painter) (1830–1889), Irish painter John Carroll O'Connor, full name of American actor Carroll O'Connor (1924–2001) John Jay O'Connor (1930–2009), American lawyer and husband of United States Supreme Court Justice Sandra Day O'Connor John J. O'Connor (artist) (born 1972), American artist John J. O'Connor (historian) (1904–1978), American historian and sociologist John J. O'Connor (journalist) (1933–2009), American journalist and critic John J. O'Connor (mathematician) ( 1990s–2010s), owner of MacTutor History of Mathematics archive John Kennedy O'Connor (born 1964), television and radio broadcaster
See also John Conner (disambiguation) John Connor (disambiguation) Jack O'Connor (disambiguation) John O'Conor (born 1947), Irish pianist John O'Conor (rugby union), Irish international rugby union player Jon O'Connor (born 1976), English footballer John O'Connor Power (1846–1919), Irish politician "He'd Have to Get Under – Get Out and Get Under (to Fix Up His Automobile)", a song also known as "Johnny O'Connor"