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

• Latitude: 55° 3' 6'' North   (decimal: 55.0516667)
• Longitude: 70° 5' 46'' West   (decimal: -70.0961111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Joinville
• GPS Coordinate Locator Map: Lac Joinville Lat/Long