Petit lac Saint-Jean is a Lake located in Rivière-Éternité; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 11' 7'' North   (decimal: 48.1852778)
• Longitude: 70° 35' 53'' West   (decimal: -70.5980556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Éternité; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Petit lac Saint-Jean Lat/Long