Lac Cosson is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 360 meters.

• Latitude: 46° 23' 23'' North   (decimal: 46.3897813)
• Longitude: 77° 32' 30'' West   (decimal: -77.5416884)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 360 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Cosson
• GPS Coordinate Locator Map: Lac Cosson Lat/Long