Lac Tshiahku is a Lake located in Petit-Mécatina; Minganie, Quebec and has an elevation of 238 meters.

• Latitude: 51° 34' 20'' North   (decimal: 51.5722888)
• Longitude: 59° 0' 33'' West   (decimal: -59.0091046)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 238 meters
• Location: Petit-Mécatina; Minganie
• Atlas of Canada Locator Map: Lac Tshiahku
• GPS Coordinate Locator Map: Lac Tshiahku Lat/Long