Lac Castor is a Lake located in Lac-Croche; La Jacques-Cartier, Quebec.

• Latitude: 47° 20' 29'' North   (decimal: 47.3413889)
• Longitude: 71° 32' 14'' West   (decimal: -71.5372222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Croche; La Jacques-Cartier
• GPS Coordinate Locator Map: Lac Castor Lat/Long