Sunday Island is a Island located in Rainy River, Ontario and has an elevation of 404 meters.

• Latitude: 48° 4' 50'' North   (decimal: 48.0805555)
• Longitude: 91° 27' 44'' West   (decimal: -91.4622222)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 404 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Sunday Island
• GPS Coordinate Locator Map: Sunday Island Lat/Long