The Roman Catholic Archdiocese of Halifax–Yarmouth is a Roman Catholic archdiocese that includes part of the civil province of Nova Scotia.

The Archdiocese of Québec is a Latin Church ecclesiastical jurisdiction or archdiocese of the Catholic Church in Quebec, Canada. It is the oldest episcopal see in the New World north of Mexico and the primatial see of Canada. The Archdiocese of Quebec is also the metropolitan see of an ecclesiastical province with the suffragan dioceses of Chicoutimi, Sainte-Anne-de-la-Pocatière and Trois-Rivières. The archdiocese's cathedral is Notre-Dame de Québec in Quebec City.