Jack Diamond

Jack Diamond may refer to:


 * Jack Diamond (architect) (born 1932), Canadian architect
 * Jack Diamond (Canadian businessman) (1909–2001), Canadian businessman and philanthropist
 * Jack Diamond, better known as Legs Diamond (1897–1931), Irish-American gangster in Philadelphia and New York City during the Prohibition era
 * Jack Diamond (radio personality) (born 1954), American radio personality
 * Jack Diamond (comedian) (born 1941), British comedy entertainer
 * Jack Diamond, Baron Diamond (1907–2004), British politician and peer
 * Jack Diamond (footballer, born 1910) (1910–1961), English footballer
 * Jack Diamond (footballer, born 2000), English footballer