William Callaghan may refer to: * William M. Callaghan (1897–1991), United States Navy officer * Willie Callaghan (footballer, born 1941), Scottish footballer (Aberdeen FC) * Willie Callaghan (footballer, born 1943), Scottish footballer (Dunfermline Athletic, Berwick Rangers, Cowdenbeath FC, national team) * Willie Callaghan (footballer, born 1967), Scottish footballer (Dunfermline Athletic, Walsall FC, Montrose FC, Livingston FC) * Bill Callaghan (born 1948), British economist

See also