Ruisseau Mantuiahk is a River located in Havre-Saint-Pierre; Minganie, Quebec.

• Latitude: 50° 32' 7'' North   (decimal: 50.5352778)
• Longitude: 63° 41' 26'' West   (decimal: -63.6905556)
• Topography Feature Category: River
• Geographical Feature: Ruisseau
• Canadian Province/Territory: Quebec
• Location: Havre-Saint-Pierre; Minganie
• Atlas of Canada Locator Map: Ruisseau Mantuiahk
• GPS Coordinate Locator Map: Ruisseau Mantuiahk Lat/Long