O'Neill Lake is a Lake located in Nipissing, Ontario and has an elevation of 379 meters.

• Latitude: 45° 39' 34'' North   (decimal: 45.6594444)
• Longitude: 77° 52' 45'' West   (decimal: -77.8791666)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 379 meters
• Location: Nipissing
• Atlas of Canada Locator Map: O'Neill Lake
• GPS Coordinate Locator Map: O'Neill Lake Lat/Long