Halifax harbour is the closest port city to Europe
Windsor, Ontario is the Canadian city closest to the American border, with Detroit, Michigan lying just across the Detroit River.
Washington
Toronto
The closest Canadian city to the US border is Surrey, located in British Columbia. It is part of the Greater Vancouver area and shares a border with the US state of Washington.
Pittsburgh at 133 miles would be the closest large Pennsylvania city to Cleveland.
While Fort Erie, Ontario, is directly across the river from Buffalo, Fort Erie is a town and not a city. Three Canadian cities (Port Colborne, Welland and Niagara Falls) would appear to be equidistant. Which one of them is closest would depend on the method of measurement. From downtown to downtown, the nearest Canadian city to Buffalo would be Port Colborne. However, if measured from the closest point on Buffalo's border to the closest point on a Canadian city's boundary, the winner would be Niagara Falls, Ontario.
Fubicktck
The Canadian city closest to Virginia is Toronto, in Ontario, Canada. In addition, Niagara Falls is located in Toronto, Canada.
Niagara falls, i am supposing your asking about an American city, closest Mexican city would be Juares. closest begique city would be Oust end. and depending on what part of the US your coming from aswell. Juneau Alaska is close to the border.
Probably the closest major Canadian city to those coordinates is Winnipeg, Manitoba. It's exact coordinates are Latitude: 49° 52' 60 N, Longitude: 97° 10' 0 W.
Potsdam, NY is about 15 miles away from the Canadian border. The closest Canadian city across the border would be Cornwall, Ontario.