Rocher Algernon is a Island located in Saint-Jean-Port-Joli; L'Islet, Quebec.

• Latitude: 47° 12' 9'' North   (decimal: 47.2025227)
• Longitude: 70° 21' 15'' West   (decimal: -70.3542394)
• Topography Feature Category: Island
• Geographical Feature: Rocher
• Canadian Province/Territory: Quebec
• Location: Saint-Jean-Port-Joli; L'Islet
• GPS Coordinate Locator Map: Rocher Algernon Lat/Long