William Forster may refer to:
- William Forster (English politician), MP for Berkshire in 1572–1576
- William Forster (bishop) (died 1635), Church of England bishop of Sodor and Man
- William Forster (mathematician) (fl. 1632–1673), English mathematician
- William Forster (cricketer) (1884–1930), Australian cricketer
- William Forster (philanthropist) (1784–1854), Quaker preacher and philanthropist
- William Forster (British Army officer) (1798–1870) British Army officer
- William Forster (Australian politician) (1818–1882), premier of New South Wales and poet
- William Edward Forster (1818–1886), British statesman, Liberal MP, and chief secretary for Ireland
- William Mark Forster (1846–1921), Australian philanthropist.
- William Thomas Forster (1857-1938), Canadian politician.
- William Forster (judge) (1921–1997), first chief justice of the Northern Territory
- William H. Forster (born 1939), U.S. Army lieutenant general
- Bill Forster (footballer), played for Crystal Palace
See also
edit- William Forster Lloyd, British economist
- Henry Forster, 1st Baron Forster (1866–1936), also known as Henry William Forster, governor-general of Australia
- William Foster (disambiguation)