Langlais is a Unincorporated area located in L'Ascension-de-Notre-Seigneur; Lac-Saint-Jean-Est, Quebec.

• Latitude: 48° 41' 29'' North   (decimal: 48.6913889)
• Longitude: 71° 40' 16'' West   (decimal: -71.6711111)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Bureau de poste
• Canadian Province/Territory: Quebec
• Location: L'Ascension-de-Notre-Seigneur; Lac-Saint-Jean-Est
• GPS Coordinate Locator Map: Langlais Lat/Long