Lac Dumarque is a Lake located in Baie-d'Hudson; Kativik, Quebec.

• Latitude: 60° 19' 51'' North   (decimal: 60.3308169)
• Longitude: 76° 16' 19'' West   (decimal: -76.2718112)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-d'Hudson; Kativik
• Atlas of Canada Locator Map: Lac Dumarque
• GPS Coordinate Locator Map: Lac Dumarque Lat/Long