William O'Connell
William or Bill O'Connell may refer to:
- William Henry O'Connell, American cardinal of the Roman Catholic Church
- William O'Connell (priest), Archdeacon of Tuam, 1928–1939
- William O'Connell (politician), member of the Queensland Legislative Assembly
- William O'Connell (actor), American film and television actor
- Bill O'Connell (musician)
- Bill O'Connell (rugby union)