Lac Longtin is a Lake located in Lac-De La Bidière; Antoine-Labelle, Quebec and has an elevation of 422 meters.

• Latitude: 47° 8' 50'' North   (decimal: 47.1472222)
• Longitude: 74° 39' 35'' West   (decimal: -74.6597222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 422 meters
• Location: Lac-De La Bidière; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Longtin
• GPS Coordinate Locator Map: Lac Longtin Lat/Long