Duncan City Rock is a Shoal located in Manitoulin, Ontario and has an elevation of 176 meters.

• Latitude: 46° 0' 14'' North   (decimal: 46.0038888)
• Longitude: 81° 43' 32'' West   (decimal: -81.7255555)
• Topography Feature Category: Shoal
• Geographical Feature: Rock
• Canadian Province/Territory: Ontario
• Elevation: 176 meters
• Location: Manitoulin
• Atlas of Canada Locator Map: Duncan City Rock
• GPS Coordinate Locator Map: Duncan City Rock Lat/Long