William Hayes

William Hayes may refer to:

In politics

 * William Hayes (Irish politician), Irish Sinn Féin politician
 * William Hayes (Canadian politician) (1879–1939), member of the Legislative Assembly of Alberta
 * William P. Hayes (1866–1940), American lawyer and mayor of Springfield, Massachusetts

In sport

 * William Hayes (American football) (born 1985), American football player
 * William Hayes (Australian cricketer) (1883–1926), Australian cricketer
 * William Hayes (New Zealand cricketer) (1890-1972), New Zealand cricketer
 * William Hayes (diver) (born 1968), Canadian Olympic diver
 * William Hayes (rugby league), rugby league footballer of the 1930s and 1940s
 * William Hayes (wrestler) (1891–?), British wrestler
 * Willie Hayes (basketball) (born 1967), American college basketball head coach
 * Willie Hayes (1928–2014), Irish footballer
 * Will Hayes (footballer) (born 1995), Australian footballer

Other people

 * William Hayes (composer) (1708–1777), organist, conductor, writer
 * William Hayes (geneticist) (1913–1994), Irish-born microbiologist and geneticist
 * William Hayes (pastoralist) (1827–1913), Australian pastoralist
 * William Hayes (photographer) (1871–1940), Victorian photographer in York, England
 * William C. Hayes (1903–1963), American Egyptologist
 * William Prine Hayes (1919–2009), Canadian commodore and educator
 * William Q. Hayes (born 1956), U.S. federal judge
 * William Hayes (academic) (born 1930), president of St John's College, Oxford
 * Billy Hayes (writer) (born 1947), American writer
 * Bully Hayes (William Henry Hayes, 1827/29–1877), American ship's captain and trader
 * J. William Hayes (1921–1992), American entertainment lawyer