William Forster

William Forster may refer to:
 * William Forster (English politician) (died 1575), MP for Berkshire
 * William Forster (bishop) (died 1635), Church of England bishop of Sodor and Man
 * William Forster (mathematician) (fl. 1632–1673), English mathematician
 * William Forster (philanthropist) (1784–1854), English Quaker preacher and philanthropist
 * William Forster (British Army officer) (1798–1870), British Army general
 * 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
 * Bill Forster (footballer) (1879–1962), English footballer
 * William Forster (cricketer) (1884–1930), Australian cricketer
 * William Forster (judge) (1921–1997), Australian lawyer, first chief justice of the Northern Territory
 * William H. Forster (born 1939), U.S. Army lieutenant general