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

• Latitude: 48° 56' 0'' North   (decimal: 48.9333727)
• Longitude: 70° 41' 23'' West   (decimal: -70.6897947)
• 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 Jeûne
• GPS Coordinate Locator Map: Lac du Jeûne Lat/Long