Lac Gagnon is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec and has an elevation of 701 meters.

• Latitude: 48° 42' 13'' North   (decimal: 48.7036111)
• Longitude: 70° 40' 16'' West   (decimal: -70.6711111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 701 meters
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Gagnon
• GPS Coordinate Locator Map: Lac Gagnon Lat/Long