Abidjan is the largest city and the former capital of Ivory Coast. As of the 2021 census, Abidjan's population was 6.3 million, which is 21.5 percent of the overall population of the country, making it the sixth most populous city proper in Africa, after Lagos, Cairo, Kinshasa, Dar es Salaam, and Johannesburg. A cultural crossroads of West Africa, Abidjan is characterised by a high level of industrialisation and urbanisation. It is the most populous French-speaking city in West Africa.
Summary from Wikipedia.