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

• Latitude: 57° 40' 26'' North   (decimal: 57.6737575)
• Longitude: 68° 16' 58'' West   (decimal: -68.2828892)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Garreau
• GPS Coordinate Locator Map: Lac Garreau Lat/Long