Denis O'Connor may refer to:
Sir Denis O'Connor (British Army officer) (1907–1988), British general Sir Denis O'Connor (police officer) (born 1949), British police officer Denis O'Connor (bishop) (1841–1911), Roman Catholic Archbishop of Toronto Denis O'Connor (British-Irish sculptor), sculptor Denis O'Connor (New Zealand sculptor) (born 1947), New Zealand ceramicist, sculptor and writer
See also Dennis O'Connor (disambiguation) Denis O'Conor, Irish nobleman and politician Denis Charles Joseph O'Conor (1869–1917), Irish lawyer Denis Maurice O'Conor (1840–1883), Irish politician