William Long
William Long may refer to:
Politicians
- William Long (fl.1388), MP for Barnstaple
- William Long (died c.1426), MP and Mayor for Rye
- William Long (mayor), mayor of Columbus, Ohio
- William Long (antiquary), English antiquarian
- William Long (New [South Wales politician)], race-horse owner and Colonial Treasurer of New South Wales
- William Long (Australian politician), member of the Australian Parliament for Lang
- William Long (Northern Ireland politician), Unionist politician in Northern Ireland
- William Houston Long, member of the Queensland Legislative Council
- Brock Long, full name William Brockmann Long, Administrator of the U.S. Federal Emergency Management Agency
- Billy Long, American politician
Others
- William J. Long, American nature writer
- William Ivey Long, American costume designer
- William Long (rowing), American Olympic athlete
- William Long (surgeon), English surgeon
- Private William Long, murdered in the 2009 [Little Rock recruiting office shooting]
- William Long (priest), Canon of Windsor
- William Henry Long, American mycologist
- Will West Long, Cherokee mask maker, a translator, and a Cherokee cultural historian