John Downey may refer to:

  • John G. Downey (1827–1894), Governor of California
  • John T. Downey (1930–2014), former CIA officer shot down over communist China and imprisoned for two decades
  • John V. Downey (c. 1884–1960), New York politician
  • John W. Downey (1927–2004), contemporary classical composer
  • John Downey (Iowa politician) (1834–1906), Irish-born American politician in Iowa
  • John Downey (RAF officer) (1920–2010)
  • John Anthony Downey, accused of carrying out the Hyde Park bombing in 1982

See also

  • John Downie (1925–2013), Scottish footballer
  • John Downey Works, Californian senator