Poste-John is a Unincorporated area located in Rivière-Bonjour; Matane, Quebec.

• Latitude: 48° 39' 0'' North   (decimal: 48.6500454)
• Longitude: 67° 16' 13'' West   (decimal: -67.2702666)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Lieu-dit
• Canadian Province/Territory: Quebec
• Location: Rivière-Bonjour; Matane
• GPS Coordinate Locator Map: Poste-John Lat/Long