Lac Séguin is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 274 meters.

• Latitude: 46° 12' 20'' North   (decimal: 46.2055556)
• Longitude: 77° 3' 50'' West   (decimal: -77.0638889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 274 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Séguin
• GPS Coordinate Locator Map: Lac Séguin Lat/Long