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

• Latitude: 56° 8' 28'' North   (decimal: 56.1412379)
• Longitude: 68° 24' 34'' West   (decimal: -68.4093181)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• GPS Coordinate Locator Map: Lac Otter Lat/Long