John Merriman may refer to: John X. Merriman (1841–1926), last prime minister of the Cape Colony before the formation of the Union of South Africa in 1910 John M. Merriman (born 1946), Yale professor of French and European history John Merriman (athlete) (1936–1999), British Olympic athlete John Merriman (bishop) (died 1572), Bishop of Down and Connor, 1568–72 John G. Merriman (1929–1964), Central Intelligence Agency pilot