David Douglas Crosby (born June 28, 1949) is a Canadian prelate of the Roman Catholic Church. He is the ninth and current Bishop of Hamilton, having previously served as Bishop of St. George’s Corner Brook, Newfoundland and Labrador (2003–2007) and Bishop of Corner Brook and Labrador (2007–2010). On Thursday, September 17, 2015, during the fall 2015 Plenary Assembly of the Canadian Conference of Catholic Bishops (CCCB), Bishop Crosby was elected President-elect of the Conference; he took office at the end of the fall 2015 Plenary Assembly. At that time, Bishop Crosby succeeded the outgoing President, Archbishop Paul-André Durocher, of the Roman Catholic Archdiocese of Gatineau, in Gatineau, Quebec, Canada. Bishop Crosby is a member of the Missionary Oblates of Mary Immaculate (O.M.I.), though as a bishop his immediate superior is now the Pope. His two-year term as President of the Conference ended in 2017, with the election of Bishop Lionel Gendron of the Roman Catholic Diocese of Saint-Jean-Longueuil in Longueuil, Quebec as President.