Sienna is a Unincorporated area located in L'Ascension; Antoine-Labelle, Quebec and has an elevation of 260 meters.

• Latitude: 46° 30' 26'' North   (decimal: 46.5072697)
• Longitude: 74° 49' 9'' West   (decimal: -74.8190716)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Hameau
• Canadian Province/Territory: Quebec
• Elevation: 260 meters
• Location: L'Ascension; Antoine-Labelle
• Atlas of Canada Locator Map: Sienna
• GPS Coordinate Locator Map: Sienna Lat/Long