Lac à Johnny is a Lake located in Sainte-Marcelline-de-Kildare; Matawinie, Quebec and has an elevation of 272 meters.

• Latitude: 46° 6' 13'' North   (decimal: 46.1036111)
• Longitude: 73° 40' 20'' West   (decimal: -73.6722222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 272 meters
• Location: Sainte-Marcelline-de-Kildare; Matawinie
• Atlas of Canada Locator Map: Lac à Johnny
• GPS Coordinate Locator Map: Lac à Johnny Lat/Long