Lac Umuaku is a Lake located in Petit-Mécatina; Minganie, Quebec.

• Latitude: 51° 56' 6'' North   (decimal: 51.9350610)
• Longitude: 61° 15' 24'' West   (decimal: -61.2567012)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Petit-Mécatina; Minganie
• Atlas of Canada Locator Map: Lac Umuaku
• GPS Coordinate Locator Map: Lac Umuaku Lat/Long