O'Brien Bay is a Bay located in Cochrane, Ontario and has an elevation of 272 meters.

• Latitude: 48° 41' 19'' North   (decimal: 48.6886111)
• Longitude: 79° 46' 27'' West   (decimal: -79.7741666)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 272 meters
• Location: Cochrane
• Atlas of Canada Locator Map: O'Brien Bay
• GPS Coordinate Locator Map: O'Brien Bay Lat/Long