Lac Poisson is a Lake located in L'Ascension-de-Notre-Seigneur; Lac-Saint-Jean-Est, Quebec.

• Latitude: 48° 44' 28'' North   (decimal: 48.7411111)
• Longitude: 71° 40' 33'' West   (decimal: -71.6758333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: L'Ascension-de-Notre-Seigneur; Lac-Saint-Jean-Est
• Atlas of Canada Locator Map: Lac Poisson
• GPS Coordinate Locator Map: Lac Poisson Lat/Long