Cours d'eau Gérard-Dumas is a River located in Saint-Onésime-d'Ixworth; Kamouraska, Quebec.

• Latitude: 47° 19' 57'' North   (decimal: 47.3325221)
• Longitude: 69° 56' 16'' West   (decimal: -69.9378373)
• Topography Feature Category: River
• Geographical Feature: Cours d'eau agricole
• Canadian Province/Territory: Quebec
• Location: Saint-Onésime-d'Ixworth; Kamouraska
• Atlas of Canada Locator Map: Cours d'eau Gérard-Dumas
• GPS Coordinate Locator Map: Cours d'eau Gérard-Dumas Lat/Long