Flag Lake is a Lake located in Thunder Bay, Ontario and has an elevation of 403 meters.

• Latitude: 49° 14' 58'' North   (decimal: 49.2494444)
• Longitude: 87° 15' 11'' West   (decimal: -87.2530555)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 403 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: Flag Lake
• GPS Coordinate Locator Map: Flag Lake Lat/Long