Lac Dumas is a Lake located in Saint-André-Avellin; Papineau, Quebec.

• Latitude: 45° 47' 33'' North   (decimal: 45.7924999)
• Longitude: 75° 3' 21'' West   (decimal: -75.0558000)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saint-André-Avellin; Papineau
• GPS Coordinate Locator Map: Lac Dumas Lat/Long