Costellos Rock is a Shoal located in Ferryland, Newfoundland and Labrador and has an elevation of 40 meters.

• Latitude: 47° 5' 26'' North   (decimal: 47.0905555)
• Longitude: 52° 56' 39'' West   (decimal: -52.9441666)
• Topography Feature Category: Shoal
• Geographical Feature: Rock
• Canadian Province/Territory: Newfoundland and Labrador
• Elevation: 40 meters
• Location: Ferryland
• Atlas of Canada Locator Map: Costellos Rock
• GPS Coordinate Locator Map: Costellos Rock Lat/Long