Duffys Lake is a Lake located in Renfrew, Ontario and has an elevation of 376 meters.

• Latitude: 45° 22' 39'' North   (decimal: 45.3774999)
• Longitude: 77° 4' 29'' West   (decimal: -77.0747222)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 376 meters
• Location: Renfrew
• Atlas of Canada Locator Map: Duffys Lake
• GPS Coordinate Locator Map: Duffys Lake Lat/Long