Rivière Opémisca is a River located in Baie-James; Jamésie, Quebec and has an elevation of 367 meters.

• Latitude: 49° 57' 21'' North   (decimal: 49.9558333)
• Longitude: 74° 54' 38'' West   (decimal: -74.9105556)
• Topography Feature Category: River
• Geographical Feature: Rivière
• Canadian Province/Territory: Quebec
• Elevation: 367 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Rivière Opémisca
• GPS Coordinate Locator Map: Rivière Opémisca Lat/Long