Lac Proust is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 381 meters.

• Latitude: 49° 21' 45'' North   (decimal: 49.3625)
• Longitude: 74° 42' 30'' West   (decimal: -74.7083333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 381 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Proust
• GPS Coordinate Locator Map: Lac Proust Lat/Long