Mac's Bay is a Bay located in Manitoulin, Ontario and has an elevation of 178 meters.

• Latitude: 45° 47' 16'' North   (decimal: 45.7877777)
• Longitude: 82° 41' 37'' West   (decimal: -82.6936111)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 178 meters
• Location: Manitoulin
• Atlas of Canada Locator Map: Mac's Bay
• GPS Coordinate Locator Map: Mac's Bay Lat/Long