William Long
William Long may refer to:
Politicians
- William Long, MP for Barnstaple
- William Long, MP and Mayor for Rye
- William Long , mayor of Columbus, Ohio
- William Long , English antiquarian
- William Long , race-horse owner and Colonial Treasurer of New South Wales
- William Long , member of the Australian Parliament for Lang
- William Long , 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 , American Olympic athlete
- William Long , English surgeon
- Private William Long, murdered in the 2009 Little Rock recruiting office shooting
- William Long , Canon of Windsor
- William Henry Long, American mycologist
- Will West Long, Cherokee mask maker, a translator, and a Cherokee cultural historian