John Guest

John Guest may refer to:

People

 * John Guest (judge) (died 1707), Chief Justice of the Supreme Court of Pennsylvania
 * John Guest (1722–1785), British businessman and patriarch of the Guest family
 * John Josiah Guest (1785–1852), British industrialist
 * John Guest (naval officer) (1822–1879), United States Navy officer
 * John Guest (politician) (1867–1931), British Labour Party Member of Parliament
 * Jack Guest (1906–1972), Canadian rowing Olympic medal winner
 * John Rodney Guest (born 1935), British microbiologist
 * John Guest (geologist) (1938–2012), British volcanologist and planetary scientist

Other

 * John Guest (company), British manufacturer of push-in fittings, pipe and plastic plumbing systems