The rivière au Tonnerre (English: Tonnerre River) is a tributary of the Normandin River, flowing into the unorganized territory of Lac-Ashuapmushuan, Quebec in the Regional County Municipality (RCM) of Le Domaine-du-Roy, in the administrative region of Saguenay-Lac-Saint-Jean, in Quebec, in Canada.

The route 167 (northwesterly) connecting Chibougamau to Saint-Félicien, Quebec cuts the middle of the Tonnerre River.

The surface of the Tonnerre River is usually frozen from early November to mid-May, however, safe ice circulation is generally from mid-November to mid-April.

The Tonnerre River originates at the mouth of "Île Ronde Lake" (length: 2.8 kilometres (1.7 mi) width: 0.5 kilometres (0.31 mi) altitude: 406 metres (1,332 ft)) in the township of Ducharme.

The toponym "Rivière au Tonnerre" was formalized on June 8, 1971, at the Commission de toponymie du Québec.