William Egan
William Egan may refer to:
- William Egan (footballer), Welsh international footballer
- William Egan (gangster), St. Louis politician and organized crime figure
- William Egan (hurler), Irish hurler
- William A. Egan, American Democratic politician; Governor of Alaska, 1959–1966 and 1970–1974
- William B. Giles Egan, Justice of the Louisiana Supreme Court
- William [Bradshaw Egan], Irish American physician and politician
- William F. Egan, American electrical engineer
- William Henry Egan, member of parliament for Birkenhead West, 1923–1924 and 1929–1931
- William P. Egan, American businessman and investor