William Cleary
William Cleary may refer to:
- William E. Cleary, U.S. Representative from New York
- William J. Cleary, American politician
- William James Cleary, Australian brewery and railway executive
- William Castle Cleary, British civil servant
- Bill Cleary (Australian footballer), Australian rules footballer
- Bill Cleary (footballer, born 1931), English soccer player
- Bill Cleary (ice hockey), American ice hockey player and coach
- Bill Cleary (Irish footballer), Irish soccer player