Lac Mistamiskw is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 54° 58' 27'' North   (decimal: 54.9741667)
• Longitude: 78° 6' 8'' West   (decimal: -78.1022222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Mistamiskw
• GPS Coordinate Locator Map: Lac Mistamiskw Lat/Long