Lac Fortin is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 58° 12' 10'' North   (decimal: 58.2027778)
• Longitude: 68° 57' 10'' West   (decimal: -68.9527778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Fortin
• GPS Coordinate Locator Map: Lac Fortin Lat/Long