The Moncouche River (French: rivière Moncouche) is a tributary of the east bank of the Métabetchouane River, crossing the Laurentides Wildlife Reserve, flowing in the province from Quebec, to Canada.

The course of this river crosses the: Forestry is the main economic activity in this valley; recreational tourism, second.

This misshapen lake looks like a big X or a star; it has two large bays to the north, two in the center and two to the south.

From its source (mouth of Lake Starr), the course of the Moncouche River descends on 14.7 kilometres (9.1 mi) with a drop of 80 metres (260 ft), according these segments: From the confluence of the Moncouche river, the current descends the Métabetchouane River northward on 83.9 kilometres (52.1 mi) to the south shore of lac Saint-Jean; thence, the current crosses the latter on 22.8 kilometres (14.2 mi) towards the northeast, then follows the course of the Saguenay River via La Petite Décharge on 172.3 kilometres (107.1 mi) to Tadoussac where it merges with the Saint Lawrence estuary.

[1] The toponym "rivière Moncouche" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.