John or Jack Davenport may refer to:
Sports Jack A. Davenport (1931–1951), boxer John Davenport (rally driver), co-winner of the 1968 RAC Rally and British Leyland's Director of Motorsport from the end of 1976. John Davenport (baseball), born 1922, American baseball player in 1954 New York Giants (MLB) season John Davenport (long jumper) (born 1955), American long jumper, 1975 All-American for the Maryland Terrapins track and field team
Politicians John Davenport (Connecticut politician) (1752–1830), U.S. Representative from Connecticut, 1799–1816 John Davenport (industrialist) (1765–1848), British pottery manufacturer and member of parliament for Stoke-upon-Trent, 1832–1841 John Davenport (Ohio politician) (1788–1855), U.S. Representative from Ohio, 1827–1828
Others Jack Davenport (born 1973), British actor John Davenport (minister) (1597–1670), Puritan minister and colonist in New Haven Colony John Davenport (orientalist) (1789–1877), British orientalist scholar John Davenport (trade unionist) (died 1941), British trade unionist Otis Blackwell (1932–2002), musician who used the pseudonym John Davenport John M. Davenport (1842–1913), Church of England clergyman and writer John Thistlewood Davenport (1817–1901), English pharmacist and businessman John Davenport (economic journalist) (1904–1987) John Davenport (journalist), former host of Washington Week John Davenport (critic) (1908–1966), British poet and critic
See also John Davenport Siddeley, 1st Baron Kenilworth (1866–1956), automobile pioneer