William Petty (disambiguation)

William Petty (1623–1687) was an English economist, scientist and philosopher.

William Petty may also refer to:
 * William Petty, 2nd Earl of Shelburne (1737–1805), great-grandson of William Petty, and Prime Minister from 1782–83
 * William Petty-FitzMaurice, Earl of Kerry (1811–1836), grandson of the Prime Minister
 * William G. Petty (born 1949), judge of the Virginia Court of Appeals

Similar names

 * William Petyt (1641–1707) English Whig lawyer and writer.
 * William Petit (born 1956), American former physician and politician.