William O'Connell may refer to:
- William Henry O'Connell (1859–1944), American cardinal of the Roman Catholic Church
- William O'Connell (priest), Archdeacon of Tuam, 1928–1939
- William O'Connell (politician) (1852–1903), member of the Queensland Legislative Assembly
- William O'Connell (actor) (1929–2024), American film and television actor
This disambiguation page lists articles about people with the same name.
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