may also refer to:
- John Williams, Lord Williams Of Thame (1500-1559), Master of the King's Jewels
- John Williams (delegate) (1731–1799), North Carolina delegate to Continental Congress
- John Williams (North Carolina) (1740–1804), North Carolina State Senator
- John Williams (Pitt County) (born c. 1735), U.S. revolutionary from Pitt County, North Carolina
- John Williams (Rochester) (1807–1875) U.S. Representative from New York
- John Williams (Salem) (1752–1806), U.S. Representative from New York
- John Williams (Tennessee) (1778–1837), U.S. Senator from Tennessee
- Jonathan Williams (1750-1815), US Representative from Pennsylvania
- John Bell Williams (1918-1983), US Representative from Mississippi
- John G. Williams (born 1964), Canadian MP for Edmonton-St. Albert, Alberta
- John James Williams (1904-1988), US Senator from Delaware
- John McKeown Snow Williams (1818-1886), US Representative from Massachusetts
- John Patrick Williams (1937-), US Representative from Montana
- John Sharp Williams (1854-1932), US Representative and Senator from Mississippi
- John Stuart Williams (1818-1898), US Senator from Kentucky
- John Williams (chairman) , Chairman of Blackburn Rovers football club
- John Williams (archer) , U.S. Olympian, gold medallist
- John Williams (equestrian) , U.S. equestrian
- John Williams (referee) , retired snooker referee
- John Williams Jr , a running back with the Toronto Argonauts
- John "Hot Rod" Williams (born 1962), professional basketball player from 1986 to 1999
- John Sam Williams (born 1966), professional basketball player from 1986 to 1994
- John Henry Williams (1969–2004), son of baseball player Ted Williams
- John L. Williams (born 1964), professional American Football player from 1986 to 1995
- Ian Rotten , stage name of professional wrestler John Williams
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