John Foster may refer to:

15th/16th/17th-century politicians

• John Foster (MP for Bristol), 15th-century MP for Bristol
• John Foster (died 1576), Member of Parliament for Winchester, Plympton Erle and Hindon
• John Foster (by 1508-47/51), MP for Much Wenlock
• John Foster (died 1558), MP for Shaftesbury and Hertfordshire
• John Foster (printer) (1648–1681) was the earliest American engraver and the first Boston printer.

18th-century politicians

• John Foster of Dunleer (died 1747), MP for Dunleer, grandfather of 1st Baron Oriel
• John Thomas Foster (1747–1796), MP
• John William Foster (1745–1809), MP for Dunleer
• John Foster, 1st Baron Oriel (1740–1828), speaker of the Irish House of Commons
• John Foster (Dunleer MP) (1770–1792), MP for Dunleer 1790–1792, son of 1st Baron Oriel

19th/20th-century politicians

• John Leslie Foster (1781–1842), Irish barrister, judge and member of parliament
• John Foster (Australian politician) (1818–1900), politician in colonial New South Wales and Victoria
• John W. Foster (1836–1917), American diplomat
• John H. Foster (1862–1917), U.S. Representative from Indiana
• Kenneth Foster (politician) (John Kenneth Foster, 1866–1930), British Conservative Party politician
• John Foster (MP for Northwich) (1904–1982), British Conservative Party politician
• John Foster (Tasmanian politician) (1792–1875), member of the Tasmanian Legislative Council
• John Foster (Lord Mayor of York) on List of Lord Mayors of York
• John Foster, candidate in the 1927 Manitoba general election
• John Foster (Virginia politician) on List of mayors of Richmond, Virginia

Academics

• John Stuart Foster (1890–1944), Canadian physicist
• John S. Foster Jr. (John Stuart Foster Jr., born 1922), American physicist and government official
• John Bellamy Foster (born 1953), American Marxist scholar
• John Wells Foster (1815–1873), American geologist
• John Foster (essayist) (1770–1843), English essayist
• John Foster (philosopher) (1941–2009), British philosopher
• John Foster (canon) (died 1773), headmaster of Eton College
• John Foster (paleontologist) (born 1966), American paleontologist
• John Wilson Foster (born 1942), Irish literary critic and cultural historian

Art and entertainment

• John Foster (British singer) (born 1960), British singer
• John Foster (Italian singer) (born 1939), Italian singer
• John Foster (cartoonist) (1886–1959), also director
• John Foster (printer) (1648–1681), American printer and engraver
• John B. Foster (artist) (1865–1930), New England watercolorist
• John Foster, a character in the television series Skins
• John Foster (cinematographer), see Independent Spirit Award for Best Cinematography
• John Foster (composer) (1752–1822), English composer

Sports

• John Foster Jr. (sailor) (born 1963), American sport-sailor
• John Foster Sr. (sailor) (born 1938), American sport-sailor & sled racer
• John Foster (footballer) (born 1973), English footballer
• John Foster (baseball) (born 1978), American baseball player
• John Foster (cricketer) (born 1955), former English cricketer
• John B. Foster (baseball) (1863–1941), New York City baseball writer, sports editor, and ballclub officer
• John Foster (sport shooter) (born 1936), American sports shooter
• John Foster (water polo) (1931–2013), Australian water polo player

Journalists

• John Foster (Canadian journalist), see This Land
• John Foster (BBC journalist) on Scottish Lobby

Religious figures

• John Foster (priest) (1921–2000), Anglican dean of Guernsey
• John Foster, 18th century American clergyman, husband of Hannah Webster Foster
• John Onesimus Foster (1833–1920), American Methodist minister
• John Foster (Archdeacon of Huntingdon), Archdeacon of Huntingdon and Wisbech

Others

• John G. Foster (1823–1874), United States Army officer and Union general during the American Civil War
• John Foster, sound editor, see BAFTA Award for Best Sound
• John Foster (trade unionist), see Jeremy Dear
• John Foster (textile manufacturer) (1798–1879), British worsted cloth manufacturer
• John Foster Sr. (engineer) (1758–1827), Liverpool based British engineer
• John Foster (architect, born 1786) (1786–1846), Liverpool based British architect, son of John Foster Sr.
• John Foster (architect, born 1830) (1830–1880), Bristol based British architect
• John H. Foster (physician) (1796–1874), American physician and member of boards of education
• John Foster (died 1829), plantation owner, owned the slave Abdul Rahman Ibrahima Sori
• John Foster (fireboat), see MetalCraft Marine

See also

• Jon Foster (disambiguation)
• Jack Foster (disambiguation)
• John Forster (disambiguation)
• Jonathan Foster (disambiguation)