Brookside is a Unincorporated area located in Northumberland, Ontario and has an elevation of 98 meters.

• Latitude: 43° 58' 43'' North   (decimal: 43.9786111)
• Longitude: 78° 4' 58'' West   (decimal: -78.0827777)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: Ontario
• Elevation: 98 meters
• Location: Northumberland
• Atlas of Canada Locator Map: Brookside
• GPS Coordinate Locator Map: Brookside Lat/Long