William Hay

William, Will, Willie, or Bill Hay may refer to:

• William Hay (architect) (1818–1888), Scottish architect
• William Delisle Hay (born 1853), British author
• William Hay (author) (1875–1945), Australian novelist and essayist
• Bill Hay (radio announcer) (1887–1978), American radio announcer
• Will Hay (1888–1949), English comedian and actor

• William Hay (died 1664) (1594–1664), English politician
• William Hay (Seaford MP) (1695–1755), British MP for Seaford
• William Robert Hay (1761–1839), British barrister, cleric and magistrate
• William Hay (Australian politician) (1816–1908)

• William Hay, 1st Earl of Erroll (1423–1462), Scottish peer
• 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, 6th Lord Hay of Yester (died 1591), Scottish nobleman and courtier
• William Hay, 10th Earl of Erroll (1590s–1636), Scottish nobleman
• William Hay, 4th Earl of Kinnoull (died 1677), Scottish peer
• William Hay, 6th Earl of Kinnoull (died 1709), Scottish peer
• 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, 10th Marquess of Tweeddale (1826–1911), British politician, MP for Taunton and Haddington
• William Hay, 11th Marquess of Tweeddale (1884–1967), Scottish aristocrat, land owner and soldier
• William Hay, 15th Earl of Kinnoull (1935–2013), Scottish peer, surveyor and farmer
• Willie Hay, Baron Hay of Ballyore (born 1950), Northern Irish peer and Assemblyman

• William Howard Hay (1866–1940), American doctor, author, lecturer and dietician
• William Perry Hay (1872–1947), American zoologist
• William Walter Hay (1908–1998), American civil engineer and professor of railway engineering
• William W. Hay (1934–2022), American geologist and paleoclimatologist

• William Hay (English cricketer) (1849–1925), English cricketer
• William Arthur Hay (1873–1945), Australian cricketer
• Bill Hay (footballer) (1934–2018), Australian footballer
• Bill Hay (field hockey) (born 1934), Singaporean Olympic hockey player
• Bill Hay (born 1935), Canadian ice hockey player

• William Hay (bishop) (1647–1707), Scottish bishop
• William Hay (police commissioner) (1794–1855), English police commissioner
• William H. Hay (1860–1946), United States Army officer
• Rupert Hay (William Rupert Hay, 1893–1962), British Indian Army officer and administrator

• William Haye (1948–2019), Jamaican cricketer
• William Hay Macnaghten (1793–1841), Anglo-Indian civil servant
• William Hays (disambiguation)
• William Hayes (disambiguation)