Lac Dempster is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 342 meters.

• Latitude: 49° 59' 30'' North   (decimal: 49.9916667)
• Longitude: 75° 23' 36'' West   (decimal: -75.3933333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 342 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Dempster
• GPS Coordinate Locator Map: Lac Dempster Lat/Long