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) (1943–2026), Scottish footballer (Dunfermline Athletic, Berwick Rangers, Cowdenbeath FC, national team) Willie Callaghan (footballer, born 1967) (1967–2023), Scottish footballer (Dunfermline Athletic, Walsall FC, Montrose FC, Livingston FC) Bill Callaghan (born 1948), British economist
See also Bill Callihan (1916–1986), American football running back William O'Callaghan (disambiguation) William Callahan (disambiguation)