William Hayes
William Hayes may refer to:
In politics
- William Hayes, Irish Sinn Féin politician
- William Hayes , member of the Legislative Assembly of Alberta
- William P. Hayes, American lawyer and mayor of Springfield, Massachusetts
In sport
- William Hayes , American football player
- William Hayes , Australian cricketer
- William Hayes , New Zealand cricketer
- William Hayes , Canadian Olympic diver
- William Hayes, rugby league footballer of the 1930s and 1940s
- William Hayes , British wrestler
- Willie Hayes , American college basketball head coach
- Willie Hayes, Irish footballer
- Will Hayes , Australian footballer
- William Hayes , Australian footballer
- William Hayes, American sprinter, 3rd in the 220 yards at the 1922 USA Outdoor Track and Field Championships
- Bill Hayes , English footballer, see List of Oldham Athletic A.F.C. players
Other people
- William Hayes , organist, conductor, writer
- William Hayes , Irish-born microbiologist and geneticist
- William Hayes , Australian pastoralist
- William Hayes , Victorian photographer in York, England
- William C. Hayes, American Egyptologist
- William Prine Hayes, Canadian commodore and educator
- William Q. Hayes, U.S. federal judge
- William Hayes , president of St John's College, Oxford
- Billy Hayes , American writer
- Bully Hayes, American ship's captain and trader
- J. William Hayes, American entertainment lawyer
- Harm , a supervillain from DC Comics