William Hays
William, Bill or Will Hays may refer to:
- William Hays (general), American Civil War Union general
- William Hays (painter), American painter
- William B. Hays, Mayor of Pittsburgh, Pennsylvania
- Will H. Hays, RNC chair, postmaster general, Hays Code film industry self-censorship advocate
- William Hercules Hays, U.S. federal judge
- William [Shakespeare Hays], American poet and lyricist
- William Torrance Hays, Ontario political figure
- Bill Hays (director), British director of stage and television