The Sankuru River is a major river in the Democratic Republic of the Congo. Its approximate length of 1,200 km^[1] makes it the longest tributary of the Kasai River.

Above the confluence with its tributary Mbuji-Mayi it is also known as Lubilash.^[1] It flows northwards and then westwards crossing through a few towns, most notably Lusambo. Then it enters the Kasai River near Bena-Bendi, at 4°17′S 20°25′E / 4.283°S 20.417°E / -4.283; 20.417.