Lac Constantineau is a Lake located in Lac-Moncouche; Lac-Saint-Jean-Est, Quebec and has an elevation of 454 meters.

• Latitude: 47° 57' 31'' North   (decimal: 47.9586111)
• Longitude: 71° 55' 36'' West   (decimal: -71.9266667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 454 meters
• Location: Lac-Moncouche; Lac-Saint-Jean-Est
• Atlas of Canada Locator Map: Lac Constantineau
• GPS Coordinate Locator Map: Lac Constantineau Lat/Long