William Clifford
William Clifford may refer to:
- William Clifford (priest), English Roman Catholic theologian
- William Clifford (cricketer), English cricketer
- William H. Clifford, Ohio politician
- W. H. Clifford, writer, director, and film company head
- William Clifford (actor), American actor of the silent era
- William Clifford (bishop), English prelate of the Roman Catholic Church
- William [Kingdon Clifford], mathematician and philosopher
- William Clifford Heilman, American composer
- Billy Clifford (soccer), American professional soccer player
- Billy Clifford (footballer), English professional footballer
- Bill Clifford (runner), American middle-distance runner, 1947 NCAA 800 m winner for the Ohio State Buckeyes track and field team
- Bill Clifford (sprinter), sprinter, 1938 100 m All-American for the Notre Dame [Fighting Irish track and field] team