Tompkins Island is a Island located in Rainy River, Ontario and has an elevation of 359 meters.

• Latitude: 49° 1' 8'' North   (decimal: 49.0188888)
• Longitude: 93° 31' 43'' West   (decimal: -93.5286111)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 359 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Tompkins Island
• GPS Coordinate Locator Map: Tompkins Island Lat/Long