Jack Diamond
Jack Diamond may refer to:
- Jack Diamond (architect), Canadian architect
- Jack Diamond (Canadian businessman), Canadian businessman and philanthropist
- Jack Diamond, better known as Legs Diamond, Irish-American gangster in Philadelphia and New York City during the Prohibition era
- Jack Diamond (radio personality), American radio personality
- Jack Diamond (comedian), British comedy entertainer
- Jack Diamond, Baron Diamond, British politician and peer
- Jack Diamond (footballer, born 1910), English footballer
- Jack Diamond (footballer, born 2000), English footballer