John Duncan

John Duncan may refer to:

• John Duncan (artist) (born 1953), American artist and musician
• John Duncan (botanist) (1794–1881), Scottish weaver and botanist
• John Duncan (British Army officer) (1872–1948), British general
• John Duncan (Canadian politician) (born 1948), MP from British Columbia
• John Duncan (diplomat) (born 1958), British diplomat, ambassador for Multilateral Arms Control and Disarmament 2006–11
• John Duncan (footballer) (born 1949), Scottish football player & manager
• John Duncan (New Zealand politician) (1848–1924), New Zealand politician
• John Duncan (painter) (1866–1945), Scottish painter
• John Duncan (theologian) (1796–1870), a.k.a. 'Rabbi' Duncan, Scottish religious leader and educator
• John Duncan (traveller in Africa) (1805–1849), Scottish traveller in Africa
• John Duncan (US Administration) (born 1945), U.S. Department of the Treasury
• John Duncan (weaver) (fl. 1800), Scottish writer on weaving
• John Duncan (writer) (1721–1808), English miscellaneous writer and army chaplain
• John Duncan, Sr. (1919–1988), U.S. Representative from Tennessee
• John Alton Duncan (1932–2007), Manitoba judge
• John H. Duncan (1855–1929), American architect
• John Holt Duncan (1820–1896), one of eight founders of Beta Theta Pi, a college fraternity at Miami University
• John Riley Duncan (1850–1911), Texas lawman
• John S. Duncan (born 1955), British neurologist
• John S.R. Duncan (1921–2006), British administrator in Sudan, then diplomat, high commissioner and ambassador
• Big John Duncan, Scottish punk musician

• John Duncan, a.k.a. John Dongan (fl. c. 1410), Manx religious leader
• Art Duncan (John Arthur Duncan, 1894–1975), Canadian aviator and ice hockey player
• Jimmy Duncan (U.S. politician) (John James Duncan, Jr., born 1947), U.S. Representative from Tennessee
• John Ross Duncan (born 1944), Australian cricketer