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

• Latitude: 56° 8' 30'' North   (decimal: 56.1417908)
• Longitude: 68° 12' 38'' West   (decimal: -68.2104226)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Otelnuk
• GPS Coordinate Locator Map: Lac Otelnuk Lat/Long