Rivière-aux-Outardes is an unorganized territory in the Côte-Nord region of Quebec, Canada. It makes up almost 95% of the Manicouagan Regional County Municipality.

The eponymous Outardes River is nearly 400 kilometres (250 mi) long, and flows through the territory in a north–south direction before draining into Outardes Bay at Ragueneau. The other major river in the territory is the Manicouagan River that flows parallel and east of the Outardes River. Both these rivers are developed with large-scale hydroelectric installations, part of the Manic-Outardes Project.

The Manicouagan Reservoir, a circular lake that covers the Manicouagan impact structure, is almost entirely located within the territory.

Quebec Route 389, running for a large part between the Outardes and Manicouagan Rivers, provides access to the territory and the hydroelectric installations along these rivers. It is an isolated highway with few roadside services that are great distances apart.

Historical census populations – Rivière-aux-Outardes, Quebec

Year Pop. ±% 1986 20 —     1991 32 +60.0% 1996 59 +84.4% 2001 48 −18.6%	Year Pop. ±% 2006 134 +179.2% 2011 86 −35.8% 2016 94 +9.3% 2021 92 −2.1%
Population counts are not adjusted for boundary changes. Source: Statistics Canada

Private dwellings occupied by usual residents (2021): 56 (total dwellings: 166)

• Franquelin River
• Rivière Franquelin Branche Ouest
• Lessard River (rivière Franquelin Branche Ouest)

• Media related to Rivière-aux-Outardes, Quebec at Wikimedia Commons