Île Mercier is a Island located in Salaberry-de-Valleyfield; Beauharnois-Salaberry, Quebec and has an elevation of 37 meters.

• Latitude: 45° 14' 28'' North   (decimal: 45.2411111)
• Longitude: 74° 9' 54'' West   (decimal: -74.1650000)
• Topography Feature Category: Island
• Geographical Feature: Île / Ile
• Canadian Province/Territory: Quebec
• Elevation: 37 meters
• Location: Salaberry-de-Valleyfield; Beauharnois-Salaberry
• Atlas of Canada Locator Map: Île Mercier
• GPS Coordinate Locator Map: Île Mercier Lat/Long