Lac Giasson is a Lake located in Port-Cartier; Sept-Rivières, Quebec.

• Latitude: 49° 39' 6'' North   (decimal: 49.6517130)
• Longitude: 67° 19' 11'' West   (decimal: -67.3196980)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Port-Cartier; Sept-Rivières
• GPS Coordinate Locator Map: Lac Giasson Lat/Long