Lac Ernest is a Lake located in Mont-Laurier; Antoine-Labelle, Quebec.

• Latitude: 46° 28' 33'' North   (decimal: 46.4758333)
• Longitude: 75° 42' 50'' West   (decimal: -75.7138888)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Laurier; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Ernest
• GPS Coordinate Locator Map: Lac Ernest Lat/Long