William Long
William Long is the name of:
Politicians
- William Long (fl.1388), MP for Barnstaple (UK Parliament constituency)
- William Long (died c.1426), MP for Rye (UK Parliament constituency)
- William Long (mayor) (1781–1851), 7th mayor of Columbus, Ohio
- William Long (New South Wales politician) (1839–1915) race-horse owner and Colonial Treasurer of New South Wales
- William Long (Australian politician) (1885–1957), Member of the Australian Parliament for Lang
- William Long (Northern Ireland politician) (1922–2008), Unionist politician in Northern Ireland
Others
- William J. Long (1866–1952), American nature writer
- William Ivey Long (born 1947), costume designer
- William Long (surgeon) (1747–1818), English surgeon of Marwell Hall, Hampshire, and St Bartholomew's Hospital, London
- Private William Long, murdered in the 2009 Little Rock recruiting office shooting
- William Long (priest) (d. 1835) Canon of Windsor
See also
- Bill Long (disambiguation)