Mafia District

Mafia Island or Chole Shamba (Kisiwa cha Mafia, in Swahili) is an island of The Mafia Archipelago located in Mafia District in the southern Pwani Region of Tanzania across the Mafia Channel. The island is the third largest in Tanzanian ocean territory, but is not administratively included within the semi-autonomous region of Zanzibar, which has been politically separate since 1890. Mafia Island forms the largest part of Mafia District, one of the six administrative districts in the Pwani Region. As the Mafia Archipelago's main island, it is sometimes called Chole Shamba, meaning Chole farmlands in Swahili. This is in opposition to the historic settlement of Chole Mjini (Chole town) on Chole Island inside Mafia Bay. The island's population is over 65,000. The economy is based on fishing, subsistence agriculture and the market in Kilindoni. The island attracts some tourists, mainly scuba divers, birdwatchers, game fishermen, and people seeking relaxation.

The Mafia Archipelago or The Mafia Islands (Funguvisiwa vya Mafia, in Swahili) is a group of islands across the Mafia Channel in the Mafia District of Pwani Region's coast on the Sea of Zanj in Tanzania's Indian Ocean coast. The archipelago is composed of 9 islands and around 12 coral reefs. In total, the Mafia archipelago covers 972 km (375 sq mi) in total, of which 8.5 km (3.3 sq mi) 407 km2 are land and 565 km2 are water. and has an average elevation of 53 m (174 ft). Of the 12 reefs in the archipelago the most famous one is the Tutia Reef. The largest island in the archipelago is Mafia Island also known as Chole Shamba locally. The other eight islands inside Mafia District in addition to Mafia Island are; Juani Island, Chole Island, Jibondo Island (Kibondo), Bwejuu Island, Shungumbili Island (Thanda), Barakuni Island, Miewi Island, and Niororo Island (Nyororo).

Kilindoni is the capital of Mafia District in Pwani Region, Tanzania. It is the largest settlement on Mafia Island.