Lac du Coteau is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 49° 16' 40'' North   (decimal: 49.2778173)
• Longitude: 70° 57' 18'' West   (decimal: -70.9550664)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac du Coteau
• GPS Coordinate Locator Map: Lac du Coteau Lat/Long