Old Chelsea is a Unincorporated area located in Chelsea; Les Collines-de-l'Outaouais, Quebec and has an elevation of 135 meters.

• Latitude: 45° 30' 12'' North   (decimal: 45.5033847)
• Longitude: 75° 48' 44'' West   (decimal: -75.8121765)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Village
• Canadian Province/Territory: Quebec
• Elevation: 135 meters
• Location: Chelsea; Les Collines-de-l'Outaouais
• Atlas of Canada Locator Map: Old Chelsea
• GPS Coordinate Locator Map: Old Chelsea Lat/Long