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

• Latitude: 55° 36' 55'' North   (decimal: 55.6153999)
• Longitude: 69° 8' 4'' West   (decimal: -69.1343645)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Shirley
• GPS Coordinate Locator Map: Lac Shirley Lat/Long