The Saint-Jacques River is a tributary of the Portneuf River, flowing in the municipalities of Pont-Rouge and Saint-Basile, in the Portneuf Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, Canada.

[1] The surface of the Saint-Jacques 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 Saint-Jacques river originates in an agricultural area, on the west side of a small hamlet served by rue Germain and by chemin du rang Terrebonne, in Pont-Rouge.

[2] The toponym "Rivière Saint-Jacques" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.