Lac Coisnay is a Lake located in Chute-des-Passes; Maria-Chapdelaine, Quebec and has an elevation of 510 meters.

• Latitude: 49° 57' 21'' North   (decimal: 49.9558333)
• Longitude: 72° 6' 50'' West   (decimal: -72.1138889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 510 meters
• Location: Chute-des-Passes; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Coisnay
• GPS Coordinate Locator Map: Lac Coisnay Lat/Long