Lac Marie-Jean is a Lake located in Notre-Dame-du-Rosaire; Montmagny, Quebec.

• Latitude: 46° 55' 28'' North   (decimal: 46.9243999)
• Longitude: 70° 24' 1'' West   (decimal: -70.4002999)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Notre-Dame-du-Rosaire; Montmagny
• GPS Coordinate Locator Map: Lac Marie-Jean Lat/Long