Henry Joseph O'Leary (March 13, 1879 – March 5, 1938) was a Canadian cleric, the fifth Bishop of the Roman Catholic Diocese of Charlottetown, and later the second Archbishop of the Archdiocese of Edmonton. Born in Richibucto, New Brunswick to Henry O'Leary and Mary O'Leary, he received his higher education from St. Joseph's College in Memramcook then studied Theology at the Grand Seminary in Montreal. On September 21, 1901, O'Leary was ordained a priest in Richibucto. The same year he went to Rome, where he later earned doctorates in Theology, Philosophy, and Canon Law.