An autonomous administrative division is an administrative division of a country that has a degree of autonomy, or freedom from an external authority. Typically it is either geographically distinct from the rest of the country or populated by a national minority. Decentralization of self-governing powers and functions to such divisions is a way for a national government to try to increase democratic participation, administrative efficiency and/or to defuse internal conflicts. Countries that include autonomous areas may be federacies, federations or confederations. Autonomous areas can be divided into territorial autonomies, subregional territorial autonomies and local autonomies.
Zanzibar (//; from Arabic: زنجبار Zanjibār, from Persian: زنگبار Zangibār "Coast of Blacks"; zangi [black-skinned] + bār [coast]) is a semi-autonomous part of Tanzania, in East Africa. It is composed of the Zanzibar Archipelago in the Indian Ocean, 25–50 kilometres (16–31 mi) off the coast of the mainland, and consists of numerous small islands and two large ones: Unguja (the main island, referred to informally as Zanzibar), and Pemba.