Lac Numéro Un is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec.

• Latitude: 48° 57' North   (decimal: 48.9499999)
• Longitude: 73° 18' West   (decimal: -73.3000000)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac Numéro Un
• GPS Coordinate Locator Map: Lac Numéro Un Lat/Long