Lac Mary is a Lake located in Rivière-Koksoak; Kativik, Quebec and has an elevation of 541 meters.

• Latitude: 55° 16' 50'' North   (decimal: 55.2806600)
• Longitude: 66° 32' 57'' West   (decimal: -66.5492685)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 541 meters
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Mary
• GPS Coordinate Locator Map: Lac Mary Lat/Long