William Clifford

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