William Clifford may refer to:
- William Clifford (priest) (died 1670), English Roman Catholic theologian
- William Clifford (cricketer) (1811–1841), English cricketer
- William H. Clifford (1862–1929), Ohio politician
- W. H. Clifford (William H. Clifford), writer, director, and film company head
- William Clifford (actor) (1877–1941), American actor of the silent era
- William Clifford (bishop) (1823–1893), English prelate of the Roman Catholic Church
- William Kingdon Clifford (1845–1879), mathematician and philosopher
- William Clifford Heilman (1877–1946), American composer
- Billy Clifford (soccer), American professional soccer player
- Billy Clifford (footballer) (born 1992), English professional footballer
This disambiguation page lists articles about people with the same name.
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