Lac Pien is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 56° 3' 17'' North   (decimal: 56.0548477)
• Longitude: 69° 16' 21'' West   (decimal: -69.2724139)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Pien
• GPS Coordinate Locator Map: Lac Pien Lat/Long