William Churchill may refer to:

• William Churchill (Dorchester MP) (1627–1702), MP for Dorchester 1685–1689
• William Churchill (Ipswich MP) (1661–1737), MP for Ipswich 1707–1714 and 1715–1717
• William Churchill (ethnologist) (1859–1920), American Polynesian ethnologist and philologist
• William Churchill (athlete) (1885–1969), American long-distance runner
• Bill Churchill (1904–1959), Australian rules footballer
• William Algernon Churchill (1865–1947), art historian and British diplomat
• William Nosworthy Churchill (1796–1846), British-born journalist in Turkey
• William Sydney Churchill (1860–1918), British military officer

• British Coal Utilization Research Association
• British Coal v. the King
• British Coastal Forces of World War II
• British Coastal Forces of World War Two
• British Coast Guard
• British coat of arms
• British Co-Ed High School
• British college of osteopathic medicine
• British College of Osteopathic Medicine
• British College of Osteopathic Medicine (BCOM)
• British College of Psychic Studies
• British Colonial America
• British colonial america
• British Colonial Army
• British Colonial Auxiliary Forces
• British Colonial Conference
• British Colonial Empire
• British colonial flags
• British colonial grants in North America (1621-1639)
• British Colonial Invasion of Kenya
• British Colonialism and the BBC
• British colonial system
• British colonial taxpayers and all workers union
• British colonies of West Africa
• British colonisation of Africa