Lac la Mousse is a Lake located in Sainte-Apolline-de-Patton; Montmagny, Quebec and has an elevation of 489 meters.

• Latitude: 46° 48' 45'' North   (decimal: 46.8125238)
• Longitude: 70° 14' 5'' West   (decimal: -70.2347913)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 489 meters
• Location: Sainte-Apolline-de-Patton; Montmagny
• Atlas of Canada Locator Map: Lac la Mousse
• GPS Coordinate Locator Map: Lac la Mousse Lat/Long