William Barr (born 1950) is an American lawyer and government official.
William Barr may also refer to:
- William G. Barr (1920–1987), Illinois state representative and businessman
- William Barr (historian) (born 1940), Scottish historian at the University of Calgary, Canada
- William Barr (artist) (1867–1933), Scottish / Californian artist
- Billy Barr (footballer) (born 1969), English footballer and coach
- Billy Barr (naturalist), American amateur scientist, known for collecting climate change data
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: