Lake Saint Francis (Canada)

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Lake Saint Francis
lac Saint-François
Lake St Francis Ontario.JPG
View of Lake St. Francis from Highway 2 in South Glengarry, Ontario, near the Quebec border.
Lake Saint Francis is located in Ontario
Lake Saint Francis
Lake Saint Francis
LocationOntario/Quebec/New York
Coordinates45°10′N 74°22′W / 45.167°N 74.367°W / 45.167; -74.367Coordinates: 45°10′N 74°22′W / 45.167°N 74.367°W / 45.167; -74.367
Primary inflowsSaint Lawrence River
Primary outflowsSaint Lawrence River
Basin countriesCanada, United States
Official nameLac Saint-François
Designated27 May 1987
Reference no.361[1]

Lake Saint Francis (French: lac Saint-François) is a lake which borders southeastern Ontario, southwestern Quebec and northern New York State. It is located on the Saint Lawrence River between Lake Ontario and Montreal, Quebec. The lake forms part of the Saint Lawrence Seaway.

The city of Salaberry-de-Valleyfield is located at the east end of the lake.

Lac Saint-François National Wildlife Area, located on the south shore of the lake, protects wetlands located on the shores of the lake. This area provides important habitat for Redhead ducks and other waterfowl. Thousands of migrating waterfowl stop over in this region. In 1987, it was recognized as a wetland of international significance under the Ramsar Convention.

The Charlottenburgh Marsh, including Cooper Marsh, is an important wetland area located on the north shore of the lake.


  1. ^ "Lac Saint-François". Ramsar Sites Information Service. Retrieved 25 April 2018.

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