William Stanhope may refer to:
- William Stanhope (1626–1703), MP for Nottingham
- William Stanhope, 1st Earl of Harrington (c. 1690–1756), British statesman and diplomatist
- William Stanhope, 2nd Earl of Harrington (1719–1779), English politician, soldier and nobleman
- William Stanhope, 11th Earl of Harrington (1922–2009), British captain and peer
- William Stanhope (1702–1772), British Member of Parliament for Buckinghamshire and Lostwithiel