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

• Latitude: 57° 55' 8'' North   (decimal: 57.9188889)
• Longitude: 71° 40' 12'' West   (decimal: -71.67)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Monchy
• GPS Coordinate Locator Map: Lac Monchy Lat/Long