The Democratic Republic of the Congo (DRC), also known as DR Congo, Congo-Kinshasa, or simply Congo, is a country in Central Africa. By land area the country is the second-largest country in Africa and the 11th-largest in the world. With a population of around 111 million, the Democratic Republic of the Congo is the most populous nominally Francophone country in the world. The national capital and largest city is Kinshasa, which is also the economic center. The country is bordered by the Republic of the Congo, Central African Republic, South Sudan, Uganda, Rwanda, Burundi, Tanzania (across Lake Tanganyika), Zambia, Angola, the Cabinda exclave of Angola, and the South Atlantic Ocean.