William Webster
William Webster may refer to:
- William Webster (clergyman) (1689–1758), British clergyman
- William Bennett Webster (1798–1861), doctor, amateur geologist and political figure in Nova Scotia, Canada
- William Downing Webster (1868–1913), British dealer in ethnographic art
- William H. Webster (born 1924), American judge, FBI director and CIA director
- William Webster (engineer), American engineer, recipient of the John Fritz Medal
- William L. Webster (born 1953), former Missouri state representative and attorney general
- William Webster (cricketer) (1880–1931), English cricketer
- William Webster (Australian politician) (1860–1936)
- William Maule McDowell Webster (1885–1958), Australian trade unionist and NSW Labor Party president