William Oliver may refer to:
William Bacon Oliver (1867–1948), American congressman
William M. Oliver (1792–1863), American lawyer and politician
William Oliver (songwriter) (1800–1848), Newcastle upon Tyne born songwriter
William Oliver (footballer) (1892–?), English footballer
William Oliver (physician) (1695–1764), inventor of the Bath Oliver biscuit
William Oliver (politician) (1850–1951), mayor of Lethbridge, Alberta, Canada
William Oliver (UK politician), MP in the Northern Ireland Parliament for Belfast Dock
Bill Oliver, college football coach
William Oliver (British Army officer) (1901–1981), British general
William Silver Oliver (1836–1908), Irish-born Canadian military surgeon
William Hosking Oliver (1925–2015), New Zealand writer and poet
William J. Oliver, 19th century informer and suspected agent provocateur
William J. Oliver (industrialist), early 20th century American contractor
William Olyver, MP for Gloucester (UK Parliament constituency)