John Grant may refer to:

Entertainment

• John Grant (author) (1949–2020), pseudonym used by science fiction writer Paul Le Page Barnett
• John Grant (children's author) (1930–2014), Scottish writer and illustrator known for the Littlenose series
• John Grant (novelist) (born 1933), writes under the pen name Jonathan Gash
• John Grant (pipe-major) (1876–1961), Scottish bagpipe player
• John Grant (musician) (born 1968), lead vocalist with The Czars
• John Grant (screenwriter) (1891–1955), wrote for Abbott and Costello
• John Grant (born 1960), pseudonym Jock Strap, vocalist with London punk band The Straps
• John Moreau Grant (1895–1986), Canadian naval officer
• Johnny Grant (radio personality) (1923–2008), American radio personality
• John Grant, character in Action for Slander
• John Grant, character in Wake in Fright

Military

• John Duncan Grant (1877–1967), British soldier
• John Gildroy Grant (1889–1970), New Zealand soldier
• John Robert Grant (1729–1790), British soldier, American Loyalist and the first British settler of Summerville, Nova Scotia
• John Grant (Royal Navy officer) (1908–1996), admiral who commanded the Reserve Fleet of the Royal Navy
• Johannes Grant, Scottish engineer who fought in the Siege of Constantinople

Politics

• John Gaston Grant (1858–1923), U.S. Representative from North Carolina
• John Grant (British diplomat) (born 1954), British diplomat and head of the UK's Mission to the European Union
• John Grant (British politician) (1932–2000), British Labour and SDP Member of Parliament
• John Grant (Gunpowder Plot) (c. 1570–1606), one of the conspirators in the Gunpowder Plot
• John Grant (Manchester politician), Manchester councillor for Whalley Range
• John Grant (Australian politician) (1857–1928), Australian Senator
• John Grant (Queensland politician) (born 1954), member of the Legislative Assembly of Queensland from 2012 to 2015
• John Grant (Canadian politician) (1841–1919), Scottish-born merchant and political figure in British Columbia
• John James Grant (born 1936), Lieutenant Governor of Nova Scotia
• John Peter Grant (MP) (1774–1848), Scottish politician
• John Grant, 13th Earl of Dysart (born 1946), Scottish peer, landowner and conservationist
• John Peter Grant (1807–1893), British colonial administrator

Sports

• John Grant (American football) (born 1950)
• John Grant (Scottish footballer) (1931–2021)
• John Grant (footballer, born 1891), English
• John Grant (footballer, born 1981), English
• John Grant (rugby league) (born 1950), Australian
• John Grant (cricketer) (born 1941), Australian
• John Grant Jr. (born 1974), Canadian lacrosse player
• Jackie Grant (1907–1978), West Indian cricketer

Other

• John Grant (priest) (fl. 1731–1744), Archdeacon of Barnstaple
• John Grant (neurosurgeon) (1922–2013), neurosurgeon and disability sport administrator
• John C. Boileau Grant (1886–1973), British-Canadian anatomist
• John Marion Grant (1961–2021), American convict executed in Oklahoma
• John T. Grant (1813–1887), American railroad builder
• John T. Grant (judge) (1920–2010), justice of the Nebraska Supreme Court.
• John W. Grant (1867–1938), Atlanta merchant and banker in the late 19th century

See also

• Jack Grant (disambiguation)
• Johnny Grant (disambiguation)
• Johnson Grant (1773–1844), Scottish divine