Lac Dadson is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 391 meters.

• Latitude: 49° 58' 37'' North   (decimal: 49.9769444)
• Longitude: 74° 59' 8'' West   (decimal: -74.9855556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 391 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Dadson
• GPS Coordinate Locator Map: Lac Dadson Lat/Long