Zanzibar Archipelago, an island group off the coast of East Africa consisting of the islands of Zanzibar plus Mafia Island
Sultanate of Zanzibar, a country between 1856 and 1964 (from 1890 onward a protectorate of the United Kingdom), which comprised the Zanzibar Archipelago and parts of the east coast of what is today Tanzania
People's Republic of Zanzibar, a short-lived state consisting of the islands of the Zanzibar, which was proclaimed and then merged into the newly formed Tanzania in 1964