 The Archdiocese of Toronto covers a geographic region of the Great Lakes area, which stretches from the shores of Lake Ontario north to Georgian Bay.The area is some 13,000 square kilometers, containing intensely urban and suburban regions and also small cities, towns and rural areas.The Archdiocese of Toronto includes the City of Toronto, the most populous metropolis in the country and the growing regional municipalities of Peel, York and Durham that surround the City.