William Webster may refer to:
Sportsmen William Webster (baseball) (1896–?), American Negro leagues baseball player William Webster (cricketer, born 1876) (1876–1948), Scottish cricketer William Webster (cricketer, born 1880) (1880–1931), English cricketer William Webster (cricketer, born 1910) (1910–1986), English cricketer, footballer, stockbroker and administrator Billy Webster (1909–?), English soccer player Bill Webster (American football) (1903–1981), American football player
Law and politics William L. Webster (born 1953), former Missouri state representative and attorney general William Webster (Australian politician) (1860–1936), Australian politician William Maule McDowell Webster (1885–1958), Australian trade unionist and NSW Labor Party president William H. Webster (1924–2025), American judge, FBI director and CIA director William Bennett Webster (1798–1861), doctor, amateur geologist and political figure in Nova Scotia, Canada William Gourlay Webster (1884–1965), civil engineer, surveyor and politician in Ontario, Canada
Others William Webster (theologian) (1689–1758), British clergyman W. D. Webster (William Downing Webster, 1868–1913), British dealer in ethnographic art William Webster (engineer), American engineer, recipient of the John Fritz Medal William Webster (builder) (1819–1888), English builder William Webster (chemical engineer) (1855–1910), son of English builder, scientist involved in development of x-rays William Webster (dean of Aberdeen and Orkney) (1810–1896) William G. Webster (born 1951), United States Army officer William Henry Webster (1850–1931), priest and malacologist in New Zealand William M. Webster, businessman and writer from South Carolina Bill Webster, a fictional character from the British soap opera Coronation Street