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

• Latitude: 57° 56' 6'' North   (decimal: 57.9348929)
• Longitude: 69° 38' 10'' West   (decimal: -69.6359904)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• GPS Coordinate Locator Map: Lac Jacob Lat/Long