Marquis Rock is a Shoal located in Parry Sound, Ontario and has an elevation of 177 meters.

• Latitude: 45° 19' 17'' North   (decimal: 45.3213888)
• Longitude: 80° 20' 56'' West   (decimal: -80.3488888)
• Topography Feature Category: Shoal
• Geographical Feature: Rock
• Canadian Province/Territory: Ontario
• Elevation: 177 meters
• Location: Parry Sound
• Atlas of Canada Locator Map: Marquis Rock
• GPS Coordinate Locator Map: Marquis Rock Lat/Long