Lac des Joncs is a Lake located in Baie-Sainte-Catherine; Charlevoix-Est, Quebec and has an elevation of 215 meters.

• Latitude: 47° 59' 57'' North   (decimal: 47.9991666)
• Longitude: 69° 57' 45'' West   (decimal: -69.9625000)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 215 meters
• Location: Baie-Sainte-Catherine; Charlevoix-Est
• Atlas of Canada Locator Map: Lac des Joncs
• GPS Coordinate Locator Map: Lac des Joncs Lat/Long