Lac Mathilda is a Lake located in Harrington; Argenteuil, Quebec and has an elevation of 239 meters.

• Latitude: 45° 54' 43'' North   (decimal: 45.9119443)
• Longitude: 74° 36' 19'' West   (decimal: -74.6052777)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 239 meters
• Location: Harrington; Argenteuil
• Atlas of Canada Locator Map: Lac Mathilda
• GPS Coordinate Locator Map: Lac Mathilda Lat/Long