It flows in the Saint-Luc sector, of the municipality of Saint-Jean-sur-Richelieu, in the Le Haut-Richelieu Regional County Municipality, in the region administrative of Montérégie, in southern part of the province of Quebec, in Canada.

Safe traffic on the ice is generally from late December to early March.

The main hydrographic slopes near the "Rivière des Iroquois" are: The Rivière des Iroquois draws its head water from an agricultural area north of Chemin Saint-André, in the Saint-Luc sector, at Saint-Jean-sur-Richelieu.

The Iroquois River flows onto the east bank of the Chambly Canal, located on the west side of the Richelieu River, opposite the Île Sainte -Thérèse, at the northern limit of the urban area of Saint-Jean-sur-Richelieu.

The toponym "Rivière des Iroquois" was formalized on February 11, 1976 at the Place Names Bank of the Commission de toponymie du Québec.