William McCoy
William McCoy may refer to:
- William S. McCoy, American rum-runner during Prohibition
- William McCoy (congressman), American politician
- William McCoy (mutineer), Scottish mutineer on HMS Bounty
- William F. McCoy, former lawyer and politician in Nova Scotia, Canada
- W. F. McCoy, Speaker of the Northern Ireland House of Commons
- William J. McCoy, American composer
- William J. McCoy (Mississippi politician), American politician and Speaker of the Mississippi House of Representatives