William or Bill Newton may refer to:

Entertainment

• William Newton (poet) (1750–1830), English poet, the Peak Minstrel from Derbyshire
• William John Newton (1785–1869), English miniature-painter
• Frankie Newton (William Frank Newton, 1906–1954), American jazz trumpeter
• William Newton (novelist), pseudonym of Kenneth Newton (1927–2010), English doctor
• William Arnold Newton (1965–1990), actor and producer of gay erotic films

Military

• Bill Newton (William Ellis Newton, 1919–1943), Australian recipient of the Victoria Cross
• William Newton (British Army officer) (died 1730), brigadier-general

Politics

• William Newton (MP for Dorchester) (died 1453), English MP for Dorchester
• William Newton (MP for Ipswich) (1783–1862), English MP for Ipswich
• William Newton (Mauritian politician) (1842–1915), Mauritian barrister, politician and MP

Sports

• William Newton (footballer) (1900–1965), English soccer player
• William Newton (sport shooter), British Olympic shooter

Other

• William Newton (architect, 1730–1798), English architect
• William Newton (architect, 1735–1790), English architect
• William Newton (priest) (1843–1914), American Episcopalian priest and author
• William Newton (trade unionist) (1822–1876), English trade unionist, journalist, and Chartist

See also

• William Newton Byers (1831–1903), American founding figure of Omaha, Nebraska
• William Newton-Smith (born 1943), Anglo-Canadian philosopher of science
• Billy Newton-Davis (born 1951), Canadian singer-songwriter
• Bill Newton Dunn (born 1941), British politician in the European Parliament
• Williams Newton (1893–1970), American football and baseball coach