Lac Demers is a Lake located in Notre-Dame-du-Sacré-C¿ur-d'Issoudun; Lotbinière, Quebec.

• Latitude: 46° 33' 35'' North   (decimal: 46.5597222)
• Longitude: 71° 38' 42'' West   (decimal: -71.645)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Notre-Dame-du-Sacré-C¿ur-d'Issoudun; Lotbinière
• Atlas of Canada Locator Map: Lac Demers
• GPS Coordinate Locator Map: Lac Demers Lat/Long