Lac Tanguay is a Lake located in Saint-Nazaire-de-Dorchester; Bellechasse, Quebec and has an elevation of 382 meters.

• Latitude: 46° 33' 21'' North   (decimal: 46.5558333)
• Longitude: 70° 41' 17'' West   (decimal: -70.6880555)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 382 meters
• Location: Saint-Nazaire-de-Dorchester; Bellechasse
• Atlas of Canada Locator Map: Lac Tanguay
• GPS Coordinate Locator Map: Lac Tanguay Lat/Long