John Root may refer to:
John Root (19th c.), Swedish immigrant to Louisiana who killed Eric Jansson (died 1850) John Root (19th–20th c.), American baseball player who played in the Missouri Valley League John B. Root (born 1958, as Jean Guilloré), French porn director John Henry Haines Root (1908–1991), Canadian politician John Wellborn Root (1850–1891), American architect John Wellborn Root Jr. (1887–1963), his son, American architect Jack Root (John Arthur Root, 1876–1963), Hungarian-born American boxer and first light heavyweight champion John Root (politician) (1937–2025), American politician
See also William John Root (born 1959), Canadian ice hockey player