Lac Mercier is a Lake located in Sainte-Madeleine-de-la-Rivière-Madeleine; La Haute-Gaspésie, Quebec and has an elevation of 405 meters.

• Latitude: 49° 12' 17'' North   (decimal: 49.2047691)
• Longitude: 65° 15' 10'' West   (decimal: -65.2526906)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 405 meters
• Location: Sainte-Madeleine-de-la-Rivière-Madeleine; La Haute-Gaspésie
• Atlas of Canada Locator Map: Lac Mercier
• GPS Coordinate Locator Map: Lac Mercier Lat/Long