The Sableuse River is a watercourse in the Matapedia Valley, in administrative region of Bas-Saint-Laurent, in Quebec, Canada. Its origin lies in the Sableuse ponds in Saint-Vianney while its mouth lies in the Sableuse River Bay on Lake Matapedia. This river flows into the regional county municipalities (RCM): * La Matapedia Regional County Municipality: municipality Saint-Vianney, Quebec and the unorganized territory of Lac-Matapedia, Quebec; * La Matanie Regional County Municipality: municipality Sainte-Paule.