John Guest
John Guest may refer to:
People
- John Guest (judge), Chief Justice of the Supreme Court of Pennsylvania
- John Josiah Guest, British industrialist
- John Guest (naval officer), United States Navy officer
- John Guest (politician), British Labour Party Member of Parliament
- Jack Guest, Canadian rowing Olympic medal winner
- John Rodney Guest, British microbiologist
- John Guest (geologist), British volcanologist and planetary scientist
Other
- John Guest (company), British manufacturer of push-in fittings, pipe and plastic plumbing systems