Lac Antonio is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec and has an elevation of 591 meters.

• Latitude: 48° 50' 35'' North   (decimal: 48.8430556)
• Longitude: 71° 18' 15'' West   (decimal: -71.3041667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 591 meters
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Antonio
• GPS Coordinate Locator Map: Lac Antonio Lat/Long