Lac-Frontière is a Unincorporated area located in Lac-Frontière; Montmagny, Quebec.

• Latitude: 46° 41' 46'' North   (decimal: 46.6961349)
• Longitude: 70° 0' 6'' West   (decimal: -70.0017319)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Bureau de poste
• Canadian Province/Territory: Quebec
• Location: Lac-Frontière; Montmagny
• Atlas of Canada Locator Map: Lac-Frontière
• GPS Coordinate Locator Map: Lac-Frontière Lat/Long