Banc de Saint-Thomas is a Shoal located in Montmagny; Montmagny, Quebec and has an elevation of 17 meters.

• Latitude: 47° 0' 2'' North   (decimal: 47.0005766)
• Longitude: 70° 34' 41'' West   (decimal: -70.5781344)
• Topography Feature Category: Shoal
• Geographical Feature: Banc de sable
• Canadian Province/Territory: Quebec
• Elevation: 17 meters
• Location: Montmagny; Montmagny
• Atlas of Canada Locator Map: Banc de Saint-Thomas
• GPS Coordinate Locator Map: Banc de Saint-Thomas Lat/Long