Lac Dufreboy is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 58° 5' 41'' North   (decimal: 58.0946291)
• Longitude: 70° 40' 25'' West   (decimal: -70.6735247)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Dufreboy
• GPS Coordinate Locator Map: Lac Dufreboy Lat/Long