William Hays

William, Bill or Will Hays may refer to:


 * William Hays (general) (1819–1875), American Civil War Union general
 * William Hays (painter) (1872-1934), American painter
 * William B. Hays (1844–1912), Mayor of Pittsburgh, Pennsylvania
 * Will H. Hays (1879–1954), American movie censor
 * William Hercules Hays (1820–1880), U.S. federal judge
 * William Shakespeare Hays (1837–1907), American poet and lyricist
 * William Torrance Hays (1837–1875), Ontario political figure
 * Bill Hays (director) (1938–2006), British director of stage and television