Lac Ernest is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 440 meters.

• Latitude: 51° 21' 11'' North   (decimal: 51.3530556)
• Longitude: 72° 27' 2'' West   (decimal: -72.4505556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 440 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Ernest
• GPS Coordinate Locator Map: Lac Ernest Lat/Long