The three largest cities in Africa, by population, are Lagos, Cairo and Kinshasha-Brazzaville. As of 2010, Lagos, Nigeria, had a population of 21,000,000. The population of Cairo, Egypt, was 15,200,000, and Kinshasha-Brazzaville, located in both the Democratic Republic of the Congo and the Republic of the Congo, had 11,300,000 citizens.
Other large cities in Africa include Johannesburg, South Africa, with 7,550,000 citizens and Mogadishu, Somalia, with a population of 5,845,000.
Africa's population is expected to increase to 2.4 billion by 2050, reports the Population Reference Bureau. This projection makes it the region with the largest population growth in the world.