Lac Desmarquets is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 550 meters.

• Latitude: 54° 0' 23'' North   (decimal: 54.0063889)
• Longitude: 70° 1' 35'' West   (decimal: -70.0263889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 550 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Desmarquets
• GPS Coordinate Locator Map: Lac Desmarquets Lat/Long