Zambia, officially the Republic of Zambia (Tonga: Cisi ca Zambia; Nyanja: Dziko la Zambia), is a landlocked country in Southern-Central Africa (although some sources consider it part of East Africa). Its neighbours are the Democratic Republic of the Congo to the north, Tanzania to the north-east, Malawi to the east, Mozambique to the southeast, Zimbabwe and Botswana to the south, Namibia to the southwest, and Angola to the west. The capital city is Lusaka, located in the south-central part of Zambia. The population is concentrated mainly around Lusaka in the south and the Copperbelt Province to the northwest, the core economic hubs of the country.