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

• Latitude: 55° 21' 35'' North   (decimal: 55.3597222)
• Longitude: 70° 23' 24'' West   (decimal: -70.39)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Beausac
• GPS Coordinate Locator Map: Lac Beausac Lat/Long