Lac Pierre-Antoine is a Lake located in Rivière-Éternité; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 16' 58'' North   (decimal: 48.2828066)
• Longitude: 70° 24' 17'' West   (decimal: -70.4047907)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Éternité; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Pierre-Antoine
• GPS Coordinate Locator Map: Lac Pierre-Antoine Lat/Long