There have been several noteworthy men named John Williams:

• John Williams (actor) (1903-1983), actor
• John Williams (archer) American archer and Olympic gold medallist
• John Williams (author) (1922-), wrote historical novel Augustus
• John Williams (accordionist) , Chicago-born accordion player
• John Williams (archbishop) (1582-1650), archbishop
• John Williams (composer) (born 1932), U.S. film music composer
• John Williams (delegate) (1731-1799), North Carolina delegate to Continental Congress
• John Williams (equestrian), American equestrian
• John Williams (guitarist) (born 1941), guitarist
• John Williams (missionary) (1796-1839), missionary
• John Williams (North Carolina) (1740-1804), North Carolina State Senator
• John Williams (Pitt County) (c.1735-?), US revolutionary from Pitt County, North Carolina
• John Williams (Rochester) (1807-1875) U.S. Congressman from New York
• John Williams (Salem) (1752-1806), U.S. Congressman from New York
• John Williams (saxophonist) , saxophonist
• John Williams (referee) , retired snooker referee
• John Williams (Tennessee) (1778-1837), U.S. Senator from Tennessee
• John Williams (VC), recipient of the Victoria Cross

Also see:

• John G. Williams (born 1964), Canadian MP for Edmonton-St. Albert, Alberta
• John Henry Williams (1969-2004), son of baseball player Ted Williams
• Dr. John Williams , 3rd husband of Eva Gabor
• Dr John Williams (water scientist) - member of the Wentworth Group of Concerned Scientists