William Beresford
William Beresford may refer to:
- William Beresford (politician), British politician
- William Beresford, 1st Baron Decies, Anglican Archbishop of Tuam, great-uncle of the above
- William Beresford, 1st Viscount Beresford, British Army general, nephew of the above
- William Horsley-Beresford, 3rd Baron Decies, Anglo-Irish peer
- Lord William Beresford, Irish Victoria Cross recipient, great-nephew of Viscount Beresford
- William Beresford, 4th Baron Decies, Anglo-Irish peer