Mary Ann Bay is a Bay located in Thunder Bay, Ontario and has an elevation of 192 meters.

• Latitude: 48° 48' 18'' North   (decimal: 48.8049999)
• Longitude: 87° 30' 20'' West   (decimal: -87.5055555)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 192 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: Mary Ann Bay
• GPS Coordinate Locator Map: Mary Ann Bay Lat/Long