William Hay

William Hay may refer to:

• William Hay (died 1664) (1594–1664), English politician who sat in the House of Commons variously between 1641 and 1660
• William Hay (architect) (1818–1888), Scottish architect
• William Hay (Australian politician) (1816–1908)
• William Hay (author) (1875–1945), Australian author and essayist
• William Hay (bishop) (1647–1707), Scottish bishop
• William Hay (MP) (1695–1755), British Member of Parliament for Seaford, 1734–1755
• William Hay (police commissioner) (1794–1855), Joint Commissioner of the London Metropolitan Police, 1850–1855
• William Hay, 10th Marquess of Tweeddale (1826–1911), British politician, Member of Parliament for Taunton and Haddington
• William Hay (Northern Ireland politician) (born 1950), Member of the Northern Ireland Assembly
• William Hay, 17th Earl of Erroll (1772–1819), Scottish peer
• William Hay, 18th Earl of Erroll (1801–1846), Scottish peer
• William Howard Hay (1866–1940), American doctor, author, lecturer and conceiver of the food combining diet
• William Perry Hay (1872–1947), American carcinologist
• William Rupert Hay (1893–1962), British Indian Army officer and administrator in British India

See also

• Bill Hay (born 1935), Canadian ice hockey player
• Will Hay (1888–1949), English comedian and actor
• William Hay Macnaghten (1793–1841), Anglo-Indian civil servant
• William Hayes (disambiguation)