Lac Grandballe is a Lake located in Lac-Walker; Sept-Rivières, Quebec.

• Latitude: 50° 36' 1'' North   (decimal: 50.6002778)
• Longitude: 67° 28' 31'' West   (decimal: -67.4752778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac Grandballe
• GPS Coordinate Locator Map: Lac Grandballe Lat/Long