John Manley (born 1950) is a Canadian politician.
John Manley may also refer to:
John Manley (MP) (1622–1699), English soldier, MP and Postmaster General John Manley (archaeologist) (born 1950), British archaeologist John Henry Manley (1907–1990), American nuclear physicist John Manley (naval officer) (1733–1793), United States Navy officer John Manley (1655–1713), 17th- and 18th-century English politician