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 (Seaford 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, 11th Marquess of Tweeddale (1884–1967), Scottish aristocrat, land owner and soldier
- Willie Hay, Baron Hay of Ballyore (born 1950), Northern Irish peer and former Member of the Northern Ireland Assembly
- William Hay, 1st Earl of Erroll (1423–1462), Scottish peer
- William Hay, 4th Earl of Kinnoull (died 1677), Scottish peer
- William Hay, 6th Earl of Kinnoull (died 1709), Scottish peer
- William Hay, 15th Earl of Kinnoull (1935–2013), peer, surveyor and farmer
- William Hay, 3rd Earl of Erroll (1449–1507), Scottish peer
- William Hay, 4th Earl of Erroll (1449–1513), Scottish peer and soldier
- William Hay, 5th Earl of Erroll (1495–1522), Scottish peer and statesman
- William Hay, 6th Earl of Erroll (1521–1541), Scottish peer
- William Hay, 10th Earl of Erroll (1590s–1636), Scottish nobleman
- William Hay, 17th Earl of Erroll (1772–1819), Scottish peer
- William Hay, 18th Earl of Erroll (1801–1846), Scottish peer
- William Hay, 19th Earl of Erroll (1823–1891), Scottish peer
- William Hay, 6th Lord Hay of Yester (died 1591), Scottish nobleman and courtier
- William Hay (English cricketer) (1849–1925), English cricketer
- William Arthur Hay (1873–1945), Australian clergyman and cricketer
- William Howard Hay (1866–1940), American doctor, author, lecturer and conceiver of the food combining diet
- William Perry Hay (1872–1947), American zoologist
- William Robert Hay (1761–1839), British barrister, cleric and magistrate
- Rupert Hay (William Rupert Hay, 1893–1962), British Indian Army officer and administrator in British India
- William Delisle Hay (1853–?), British author
- William H. Hay (1860–1946), United States Army officer
- William Walter Hay (1908–1998), American civil engineer and University of Illinois professor of railway engineering
- William W. Hay (1934–2022), geologist and paleoclimatologist with the University of Colorado
See also
- Bill Hay (born 1935), Canadian ice hockey player
- Bill Hay (radio announcer) (1887–1978), American radio announcer
- Bill Hay (field hockey) (born 1934), Singaporean Olympic hockey player
- Bill Hay (footballer) (1934–2018), Australian footballer
- Will Hay (1888–1949), English comedian and actor
- William Haye (1948–2019), Jamaican cricketer
- William Hay Macnaghten (1793–1841), Anglo-Indian civil servant
- William Hays (disambiguation)
- William Hayes (disambiguation)
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: