William Baxter may refer to:

Politicians

William Baxter (Nova Scotia politician) (1760–1832), physician and politician in Nova Scotia

William Edward Baxter (1825–1890), British politician and traveller

William Duncan Baxter (1868–1960), mayor of Cape Town, South Africa, 1907–1908

William Baxter (Scottish politician) (1911–1979), British Labour Party politician, MP 1959–1974

William Baxter (American politician), American lawyer and member of the Vermont House of Representatives

Scholars and educators

William Baxter (scholar) (1650–1723), Welsh scholar

William Baxter (Oxford Botanic Garden curator) (1787–1871), Scots botanist, author of British Phaenogamous Botany

William Baxter (botanist) (1787–c. 1836), English botanist who collected in Australia

William Baxter (law professor) (1929–1998), American law professor

William H. Baxter (born 1949), American linguist

William Baxter (clergyman) (1820–1880), second president of Arkansas College

Other

William Giles Baxter (1856–1888), English cartoonist

William Robert Baxter (born 1960), British hospitality entrepreneur

William "Bucky" Baxter (1955–2020), American guitarist

Will Baxter, a fictional character in Eureka Seven anime series