John Cartwright
John Cartwright may refer to:
- Major John Cartwright (political reformer) (1740–1824), supporter of American independence and British political reform
- John Robert Cartwright (1895–1979), Chief Justice of the Supreme Court of Canada
- John Cartwright (UK politician) (born 1933), former UK Labour and SDP Member of Parliament
- John Cartwright (American football coach), American football player and coach as well as Baptist pastor
- John Cartwright (rugby league) (born 1965), Australian rugby league coach and former player
- John Cartwright (footballer) (born 1940), English professional footballer with West Ham and Crystal Palace in the 1950s and 60s
- John Cartwright (lawyer), Professor of the Law of Contract at the University of Oxford
- John Solomon Cartwright (1804–1845), businessman, lawyer, judge, farmer, and political figure