Lac Mersant is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 435 meters.

• Latitude: 48° 45' 19'' North   (decimal: 48.7552778)
• Longitude: 73° 54' 23'' West   (decimal: -73.9063888)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 435 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac Mersant
• GPS Coordinate Locator Map: Lac Mersant Lat/Long