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