Which two cities in Africa south of the Sahara have populations over 5 million?

Two cities in Africa south of the Sahara with populations over 5 million are Lagos, Nigeria, and Johannesburg, South Africa. Lagos is the most populous city in Nigeria and one of the fastest-growing cities globally, while Johannesburg is the largest city in South Africa and an important economic hub in the region. Both cities play significant roles in their respective countries' economies and cultures.