William O'Connor
William O'Connor may refer to:
- William O'Connor (fencer), American fencer
- William O'Connor (Australian politician)
- William O'Connor (darts player), Irish darts player
- William Aloysius O'Connor, American prelate of the Roman Catholic Church
- William D. O'Connor, American author
- William Patrick O'Connor, American clergyman of the Roman Catholic Church
- William Joseph O'Connor, Canadian professional rower - single sculls
- Willie O'Connor, Irish hurler
- William O'Connor (artist), American game artist