Kinshasa, 2015, capital of DR Congo, and home to about 12 million people is one of the most populous cities in sub-Saharan Africa. (Photo/ Emmanuel Imbanda Lokenga/MONUSCO/Flickr). There’s A Strong Chance That 33% Of All People In The World Will Be African By 2100 October 13, 2017 The population of Africa in 2100 will be three, four, five or six times larger than it is today.