Lac Martinet is a Lake located in Baie-d'Hudson; Kativik, Quebec.

• Latitude: 58° 10' 26'' North   (decimal: 58.1738889)
• Longitude: 75° 56' 4'' West   (decimal: -75.9344444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-d'Hudson; Kativik
• Atlas of Canada Locator Map: Lac Martinet
• GPS Coordinate Locator Map: Lac Martinet Lat/Long