奎卢-尼阿里河（Kouilou-Niari）是刚果共和国的河流，发源自刚果高原，最终在黑角以北约30公里处注入大西洋，河道全长560公里，流域面积61,707平方公里，是该国最大的河流。

The Kouilou-Niari River — also spelled Kwilu, Kwila, or Kwil — is the most important river flowing to the Atlantic ocean of the Republic of the Congo coast. Moreover, it entire drainage area is completely in the Republic of the Congo. The river is called the Kouilou River while flowing in the coastal region of the Kouilou till the Sounda gorges. Upstream from the Gorges, its name is the Niari and it flows through the Niari Valley. The river combines with the Louessé River, the Loudima and the Bouenza and eventually flows into the Atlantic Ocean. It covers about 560 km from its origin in the plateaux batéké of The Congo to its mouth at the coast.