John Petty
John Petty may refer to:
- John Petty (priest), Anglican provost and Dean of Coventry
- John Petty (Primitive Methodist minister), 19th-century author and Primitive Methodist minister and first governor of Elmfield College
- John Petty, 1st Earl of Shelburne, politician, father to former prime minister of Great Britain, William Petty, 2nd Earl of Shelburne
- John Petty, 2nd Marquess of Lansdowne, son of former prime minister of Great Britain, William Petty, 1st Marquess of Lansdowne
- John Petty Jr.,, American basketball player
- John Petty (American football), American football player