Lac Poupeau is a Lake located in Rivière-Koksoak; Kativik, Quebec and has an elevation of 513 meters.

• Latitude: 55° 17' 23'' North   (decimal: 55.2898268)
• Longitude: 66° 53' 12'' West   (decimal: -66.8867770)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 513 meters
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Poupeau
• GPS Coordinate Locator Map: Lac Poupeau Lat/Long