Lac Demaux is a Lake located in Lac-Ministuk; Le Fjord-du-Saguenay, Quebec and has an elevation of 715 meters.

• Latitude: 48° 0' 49'' North   (decimal: 48.0136111)
• Longitude: 71° 14' 45'' West   (decimal: -71.2458333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 715 meters
• Location: Lac-Ministuk; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Demaux
• GPS Coordinate Locator Map: Lac Demaux Lat/Long