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

• Latitude: 49° 48' 43'' North   (decimal: 49.8119904)
• Longitude: 67° 25' 3'' West   (decimal: -67.4174576)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac Jeff
• GPS Coordinate Locator Map: Lac Jeff Lat/Long