John Petit

John Petit may refer to:


 * John Petit (bishop) (1895–1973), Roman Catholic prelate; Bishop of Menevia, 1947–1972
 * John Lewis Petit (1736–1780), English physician
 * John Louis Petit (1801–1868), English clergyman and architectural artist
 * Sir John Petit, High Sheriff of Cornwall, 1334–1336