Lac Mistahiniu is a Lake located in Petit-Mécatina; Minganie, Quebec and has an elevation of 48 meters.

• Latitude: 50° 19' 57'' North   (decimal: 50.3325695)
• Longitude: 61° 18' 18'' West   (decimal: -61.3050705)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 48 meters
• Location: Petit-Mécatina; Minganie
• Atlas of Canada Locator Map: Lac Mistahiniu
• GPS Coordinate Locator Map: Lac Mistahiniu Lat/Long