Étang Poisseux is a Lake located in Lac-Achouakan; Lac-Saint-Jean-Est, Quebec and has an elevation of 645 meters.

• Latitude: 48° 1' 8'' North   (decimal: 48.0188889)
• Longitude: 71° 36' 51'' West   (decimal: -71.6141667)
• Topography Feature Category: Lake
• Geographical Feature: Étang
• Canadian Province/Territory: Quebec
• Elevation: 645 meters
• Location: Lac-Achouakan; Lac-Saint-Jean-Est
• Atlas of Canada Locator Map: Étang Poisseux
• GPS Coordinate Locator Map: Étang Poisseux Lat/Long