Lac à Thommy is a Lake located in Saint-Bruno; Lac-Saint-Jean-Est, Quebec.

• Latitude: 48° 29' 20'' North   (decimal: 48.4889347)
• Longitude: 71° 33' 23'' West   (decimal: -71.5564917)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saint-Bruno; Lac-Saint-Jean-Est
• GPS Coordinate Locator Map: Lac à Thommy Lat/Long