Lac Sapuminchis is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 54° 21' 49'' North   (decimal: 54.3636111)
• Longitude: 77° 54' 29'' West   (decimal: -77.9080556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Sapuminchis
• GPS Coordinate Locator Map: Lac Sapuminchis Lat/Long