Lac Johnson is a Lake located in Thorne; Pontiac, Quebec and has an elevation of 206 meters.

• Latitude: 45° 46' 41'' North   (decimal: 45.7780556)
• Longitude: 76° 23' 33'' West   (decimal: -76.3925)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 206 meters
• Location: Thorne; Pontiac
• Atlas of Canada Locator Map: Lac Johnson
• GPS Coordinate Locator Map: Lac Johnson Lat/Long