Matadi is the chief sea port of the Democratic Republic of the Congo and the capital of the Kongo Central province, adjacent to the border with Angola. It had a population of 245,862 (2004). Matadi is situated on the left bank of the Congo River, 148 km (92 mi) from the mouth and 8 km (5.0 mi) below the last navigable point before the rapids that make the river impassable for a long stretch upriver.

Boma is a port town on the Congo River, some 100 kilometres (62 mi) upstream from the Atlantic Ocean, in the Kongo Central Province of the Democratic Republic of the Congo (DRC), adjacent to the border with Angola. It had an estimated population of 162,521 in 2012.