William Cook
William, Will, Willie, Bill or Billy Cook may refer to:
Sportsmen
Association football (soccer)
- William Cook (footballer), English footballer who played for Darlington and Gateshead
- Willie Cook (footballer), Scottish footballer
- Billy Cook (footballer, born 1890), English-born footballer who played for Sheffield United
- Billy Cook (footballer, born 1895), Huddersfield Town, Aston Villa and Tottenham Hotspur
- Billy Cook (footballer, born 1909), Irish footballer who played for Celtic and Everton
- Billy Cook (footballer, born 1940), Scottish-born footballer who played for Australia
Cricket
- William Cook (Lancashire cricketer), English cricketer
- William Cook (Surrey cricketer), English cricketer
- William Cook (Leeds/Bradford MCCU cricketer), English cricketer
Other sports
- William Cook (billiards player), World Champion of English billiards in the 19th century
- W. T. Cook, American college sports coach
- Bill Cook (footballer, born 1887), Australian rules footballer for Carlton
- Bill Cook (footballer, born 1937), Australian rules footballer for Geelong
- Bill Cook, Canadian ice hockey player in the Hockey Hall of Fame
- Billy Cook (jockey), Australian jockey
- Billy Cook (baseball), baseball player
Politicians and judges
- Sir William Cook, 2nd Baronet, member of parliament
- William Cook (British industrialist), British industrialist and politician
- William Cook (MP), member of parliament for Lewes
- William Hemmings Cook, Canadian fur trader and politician, member of council of Assiniboia
- William Henry Cook, Justice of the Supreme Court of Mississippi
- William Loch Cook, Justice of the Tennessee Supreme Court
- Bill Cook (politician), Republican state senator for North Carolina
Musicians
- Willie Cook, American jazz trumpeter
- Antony Tudor, English choreographer
- Will Marion Cook, American composer and violinist
Writers and artists
- William Delafield Cook, Australian artist
- William Edwards Cook, American-born expatriate artist, architectural patron, and long-time friend of writer Gertrude Stein
- William Wallace Cook, American journalist and author
- Will Cook (writer), American writer of westerns
Scientists
- William Cook (computer scientist), American computer scientist
- William Harrison Cook, Canadian chemist
- William J. Cook, American operations researcher and mathematician
- William Richard Joseph Cook, Chief Scientific Adviser to the Ministry of Defence of Great Britain 1966–1970, mathematician and civil servant
- William Cook, 19th- and early-20th-century creator of the Orpington poultry breeds
Others
- William Cook (entrepreneur), American medical equipment manufacturer
- William Cook (pioneer), founder of Russellville, Kentucky
- William Douglas Cook, founder of Eastwoodhill Arboretum, now the national arboretum of New Zealand
- William R. Cook, American history professor, collaborator with Ron Herzman
- William W. Cook, American attorney and legal scholar
- Billy Cook (actor), American actor
- Billy Cook (criminal), American spree killer and mass murderer
- William Cook, English choreographer, better known as Antony Tudor