Lac du Sachem is a Lake located in Lac-Ernest; Antoine-Labelle, Quebec and has an elevation of 310 meters.

• Latitude: 46° 17' 15'' North   (decimal: 46.2875)
• Longitude: 75° 6' 6'' West   (decimal: -75.1016667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 310 meters
• Location: Lac-Ernest; Antoine-Labelle
• Atlas of Canada Locator Map: Lac du Sachem
• GPS Coordinate Locator Map: Lac du Sachem Lat/Long