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