Lac d'Archiac is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 57° 56' 28'' North   (decimal: 57.9410031)
• Longitude: 69° 35' 56'' West   (decimal: -69.5987643)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac d'Archiac
• GPS Coordinate Locator Map: Lac d'Archiac Lat/Long