John Hardy can refer to:

• "John Hardy" (song), an American folk song about a murderer
• John Hardy (composer), British composer
• John Hardy (geneticist), British human geneticist and molecular biologist
• John Hardy (jewelry) luxury handmade jewelry brand
• John Hardy (MP) (1773-1855), British MP and businessman and father of first Earl of Cranbrook
• John Hardy (US politician) (1835-1913), U.S. Representative from New York
• Sir John Hardy, 1st Baronet (1809-1888), British Conservative Member of Parliament
• John Crumpton Hardy (20th century), President of the Mississippi Agricultural and Mechanical College

[ Source: Wikipedia ]