William Barr may refer to:
- William Barr (politician) (born 1950), 77th Attorney General of the United States
- William Barr (Arctic historian), Arctic historian at the University of Calgary, Canada
- William Barr (artist), early 20th Century California artist
- Billy Barr, English footballer and coach
- William Barr (Spanish Texas merchant), co-founder of House of Barr and Davenport
Famous quotes containing the word barr:
“... it is always the simple that produces the marvelous.”
—Amelia E. Barr (1831–1919)