Lac Gagnon is a Lake located in Grandes-Piles; Mékinac, Quebec and has an elevation of 253 meters.

• Latitude: 46° 43' 57'' North   (decimal: 46.7325000)
• Longitude: 72° 40' 18'' West   (decimal: -72.6716666)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 253 meters
• Location: Grandes-Piles; Mékinac
• Atlas of Canada Locator Map: Lac Gagnon
• GPS Coordinate Locator Map: Lac Gagnon Lat/Long