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

See also[edit]

• Jock Barnes (1907–2000), New Zealand trade unionist
• John Barnes (disambiguation)