Thirty Island Lake is a Lake located in Frontenac, Ontario and has an elevation of 165 meters.

• Latitude: 44° 34' 16'' North   (decimal: 44.5711111)
• Longitude: 76° 35' 57'' West   (decimal: -76.5991666)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 165 meters
• Location: Frontenac
• Atlas of Canada Locator Map: Thirty Island Lake
• GPS Coordinate Locator Map: Thirty Island Lake Lat/Long