St. Mary's Harbour is a Bay located in Newfoundland and Labrador and has an elevation of 0 meters.

• Latitude: 46° 56' 25'' North   (decimal: 46.9402777)
• Longitude: 53° 32' 32'' West   (decimal: -53.5422222)
• Topography Feature Category: Bay
• Geographical Feature: Harbour
• Canadian Province/Territory: Newfoundland and Labrador
• Elevation: 0 meters
• Atlas of Canada Locator Map: St. Mary's Harbour
• GPS Coordinate Locator Map: St. Mary's Harbour Lat/Long