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

• Latitude: 57° 6' 32'' North   (decimal: 57.1087557)
• Longitude: 69° 10' 30'' West   (decimal: -69.1748955)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Natwayasu
• GPS Coordinate Locator Map: Lac Natwayasu Lat/Long