Flat Island is a Island located in Manitoulin, Ontario and has an elevation of 176 meters.

• Latitude: 46° 0' 16'' North   (decimal: 46.0044444)
• Longitude: 81° 57' 57'' West   (decimal: -81.9658333)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 176 meters
• Location: Manitoulin
• Atlas of Canada Locator Map: Flat Island
• GPS Coordinate Locator Map: Flat Island Lat/Long