Étang Numéro Un is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 336 meters.

• Latitude: 49° 23' 17'' North   (decimal: 49.3880556)
• Longitude: 72° 25' 53'' West   (decimal: -72.4313889)
• Topography Feature Category: Lake
• Geographical Feature: Étang
• Canadian Province/Territory: Quebec
• Elevation: 336 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Étang Numéro Un
• GPS Coordinate Locator Map: Étang Numéro Un Lat/Long