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

• Latitude: 49° 5' 14'' North   (decimal: 49.0872222)
• Longitude: 70° 45' 52'' West   (decimal: -70.7644444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Poisson
• GPS Coordinate Locator Map: Lac Poisson Lat/Long