Cornwall is a city in Eastern Ontario, Canada, and the seat of the United Counties of Stormont, Dundas and Glengarry. Cornwall is Ontario's easternmost city, located on the Saint Lawrence River in the Quebec City–Windsor Corridor along Ontario Highway 401, and is the urban centre for surrounding communities, including Long Sault and Ingleside to the west, Mohawk Territory of Akwesasne to the south, St. Andrew's and Avonmore to the north, and Glen Walter, Martintown, Apple Hill, Williamstown, and Lancaster to the east.
Cornwall lies on the 45th parallel, approximately 100 km southeast of Ottawa, the national capital, 120 km southwest of Montreal, Quebec's largest city, and 440 km northeast of Toronto, the provincial capital and Canada's largest city. It is named after the English Duchy of Cornwall; the City's coat of arms is based on that of the duchy with its colours reversed and the addition of a "royal tressure", a Scottish symbol of royalty.
Wikipedia https://en.wikipedia.org/wiki/Cornwall,_Ontario
Official Website http://www.cornwall.ca/
Coordinates 45°1'15.142" N -74°43'49.935" E