The Rivière d'Aulnage (English: Aulnage River) is a tributary of the rivière des Sept Îles, flowing on the north shore of the Saint Lawrence river in the municipalities of Saint-Léonard-de-Portneuf and Saint-Basile, in the Portneuf Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.

[2] The surface of the Aulnage river (except the rapids areas) is generally frozen from the beginning of December to the end of March; however, safe circulation on the ice is generally from late December to early March.

The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.

The Aulnage river takes its source at the confluence of three forest streams on the Sainte-Angélique Mountain (summit at 235 metres (771 ft)), in Saint-Léonard-de-Portneuf, near the northern limit of Saint-Basile.

The toponym "Rivière d'Aulnage" was formalized on August 17, 1978, at the Place Names Bank of the Commission de toponymie du Québec.