Jack Barnes may refer to:
Jack Barnes (politician) (born 1940), American communist and the National Secretary of the Socialist Workers Party Jack Barnes (English footballer) (1908–2008), English association footballer Jack Barnes (Australian footballer) (1905–1999), Australian rules footballer Jack Barnes (rugby league), English rugby league player Jack Barnes (toxinologist) (1922–1985), Australian toxinologist Jack Barnes (high jumper) (born 1924), American high jumper, 1949 All-American for the USC Trojans track and field team
See also Jock Barnes (1907–2000), New Zealand trade unionist John Barnes (disambiguation)