Barrière-Mésy is a Unincorporated area located in Hébertville; Lac-Saint-Jean-Est, Quebec.

• Latitude: 48° 15' 46'' North   (decimal: 48.2627778)
• Longitude: 71° 40' 44'' West   (decimal: -71.6788889)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Hameau
• Canadian Province/Territory: Quebec
• Location: Hébertville; Lac-Saint-Jean-Est
• Atlas of Canada Locator Map: Barrière-Mésy
• GPS Coordinate Locator Map: Barrière-Mésy Lat/Long