William Barrington
William Barrington may refer to:
- William Barrington (English politician), English MP for St Germans 1588–1589
- William Barrington, 2nd Viscount Barrington, British MP for Berwick and for Plymouth, Secretary at War and Chancellor of the Exchequer
- William Barrington, [6th Viscount Barrington], British MP for Berkshire, chairman of Great Western Railway
- William Barrington (diplomat), his son, British Ambassador to Argentine and Sweden
- William Barrington (Irish politician), Irish Member of the Seanad Éireann 1922–1931