Lac Gagnon is a Lake located in Rivière-Bonjour; Matane, Quebec and has an elevation of 914 meters.

• Latitude: 48° 54' 15'' North   (decimal: 48.9041666)
• Longitude: 66° 35' 56'' West   (decimal: -66.5988888)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 914 meters
• Location: Rivière-Bonjour; Matane
• Atlas of Canada Locator Map: Lac Gagnon
• GPS Coordinate Locator Map: Lac Gagnon Lat/Long