John Fraser may refer to:

Politics

• John Simon Frederick Fraser (1765–1803), commanded the Fraser Fencibles in Ireland and was (M.P.) for Inverness-shire
• John James Fraser (1829–1896), 5th Premier of the Canadian province of New Brunswick, 1878–1882
• John A. Fraser (politician) (1840–1908), political figure in Nova Scotia
• John G. Fraser (1840–1927), Orange Free State politician
• John Fraser (Ontario MP) (1849–1928), Canadian Member of Parliament for Lambton East, Ontario
• John Fraser (British Columbia politician) (1866–1960), Canadian Member of Parliament from British Columbia, 1925–1935
• Sir Malcolm Fraser, 1st Baronet (John Malcolm Fraser, 1878–1949), British newspaper editor and political agent
• John Malcolm Fraser (1930–2015), 22nd Prime Minister of Australia, 1975–1983
• John Allen Fraser (born 1931), Speaker of the Canadian House of Commons, 1986–1993
• John Fraser (British politician) (1934–2017), British Member of Parliament for Norwood
• John Fraser (Ontario MPP) (born 1958), Canadian politician elected to the Ontario legislature for Ottawa South in 2013

Sports

• John Fraser (footballer, born 1876) (1876–1952), Scottish footballer, Southampton player and Dundee manager
• John Fraser (Canadian soccer) (1881–1959), Canadian soccer player and member of the 1904 Olympic Games Canadian Team
• John Fraser (tennis) (born 1935), Australian tennis player of the 1950s and 60s
• John Fraser (footballer, born 1936), Scottish footballer for Hibernian
• John Fraser (footballer, born 1938) (1938–2011), Northern Ireland footballer for Sunderland and Watford
• John Fraser (footballer, born 1953), English footballer for Fulham
• John Fraser (footballer, born 1978), Scottish footballer whose clubs include Ross County, Clyde and Forfar Athletic

Academia

• John Fraser (botanist) (1750–1811), Scottish botanist
• John Fraser (academic) (c. 1823–1878), president of Pennsylvania State University, 1866–1868
• John Fraser (Celticist) (1882–1945), Jesus Professor of Celtic at the University of Oxford
• John Fraser (journalist) (born 1944), Canadian journalist and master of Massey College, University of Toronto

Others

• John Fraser (died 1306), Scottish independence fighter, brother of Simon Fraser
• John Fraser (bishop) (died 1507), Bishop of Ross, Scotland
• John Fraser (frontiersman) (1721–1773), colonial Pennsylvanian fur trader and soldier
• John Fraser (British Army officer, born 1760) (1760–1843)
• John Fraser (poet) (c. 1809–1849), Irish poet
• John Fraser (architect) (1825–1906), American architect
• John Fraser (ethnologist) (1834–1904), Australian ethnologist
• John Arthur Fraser (1838–1898), British artist, photography entrepreneur and teacher
• John Fraser (businessman) (1843–1907), Scottish businessman who partnered with David Chalmers Neave to co-found Fraser and Neave
• Sir John Foster Fraser (1868–1936), British Parliamentary correspondent and travel writer
• John Fraser (auditor), Auditor General of Canada, 1905–1919
• John Fraser (surgeon) (1885–1947), principal of the University of Edinburgh, 1944–1948
• John R. Fraser (1890–1959), Canadian physician
• John Fraser (minister) (1894–1985), Moderator of the General Assembly of the Church of Scotland, 1958–1959
• John Fraser (British Army officer, born 1896) (1896–1943), British recipient of the George Cross
• John Fraser (critic) (1928–2023), English/Canadian author, literary theorist, and cultural analyst
• John Fraser (film producer) (1930–2010), Australian film producer and cinema executive
• John Fraser (actor) (1931–2020), Scottish actor
• John MacLeod Fraser (1935–2010), former Canadian ambassador to China
• John Fraser (novelist, poet) (born 1939), English professor, novelist, and poet
• John A. Fraser (businessman) (born 1951), Australian businessman
• John Fraser (physician), Scottish physician
• John Fraser, musician in the James Wright Group

Other uses

• John B. Fraser, a steamship lost on Lake Nipissing, Ontario