John Haynes (disambiguation)
John Haynes may refer to:
- John Haynes (1594–1653/4), colonial governor of Massachusetts and Connecticut
- John Haynes (draughtsman) (fl. 1730–1750), British draughtsman and engraver
- John Earl Haynes, American historian
- John Haynes (Australian journalist) (1850–1917), Australian journalist
- John Haynes (cricketer), English 18th century cricketer
- John Haynes Holmes (1879–1964), American politician
- John C. Haynes & Co., American maker of musical instruments (late 19th century)
- Johnny Haynes (1934–2005), English footballer
- John Carmichael Haynes (1831–1888), Irish-born rancher, judge and public servant in British Columbia
- John Randolph Haynes (1853–1937), California socialist
- John Haynes, Jr. (born 1937), family physician, surgeon and community leader of Northwest Louisiana and Northeast Texas
- John Henry Haynes (1849–1910), American traveller, archaeologist, and photographer