William O'Connor may refer to:
William O'Connor (fencer) (1864–1939), American fencer William O'Connor (Australian politician) (1910–1987) William O'Connor (darts player) (born 1986), Irish darts player William Aloysius O'Connor (1903–1983), American prelate of the Roman Catholic Church William D. O'Connor (1832–1889), American author William Patrick O'Connor (1886–1973), American clergyman of the Roman Catholic Church William Joseph O'Connor (1862–1892), Canadian professional rower - single sculls Willie O'Connor (born 1967), Irish hurler William O'Connor (artist) (1970–2018), American game artist
See also Bill O'Connor (disambiguation) Billy O'Connor, musician William Connor (disambiguation)