|Area||1,666 km2 (643 sq mi)|
|Length||85 km (52.8 mi)|
|Width||30 km (19 mi)|
|Highest elevation||195 m (640 ft)|
|Highest point||Unnamed point in the Koani chain|
Unguja (also referred to as Zanzibar Island or simply Zanzibar, in Ancient Greek Menuthias, Μενουθιάς - as mentioned in The Periplus of the Erythraean Sea, in Greek: Περίπλους τὴς Ἐρυθράς Θαλάσσης -) is the largest and most populated island of the Zanzibar archipelago, in Tanzania.
Unguja is a hilly island, about 85 kilometres (53 miles) long (north-south) and 30 kilometres (19 miles) wide (east-west) at its widest, with an overall area of about 1,666 square kilometres (643 square miles). It is located in the southern half of the Zanzibar Archipelago, in the Indian Ocean, about 59 kilometres (37 mi) south of the second largest island of the archipelago, Pemba. Unguja and mainland Tanzania are separated by the Zanzibar Channel.
Unguja is surrounded by a number of smaller islands and islets, with only two of them, Tumbatu and Uzi, being inhabited. Other minor islands around Unguja include Bawe, Chapwani, Changuu, Chumbe, Kizingo, Kwale, Latham, Mautani, Miwi, Mnemba, Mwana wa Mwana, Nianembe, Popo, Pungume, and Ukanga.
Unguja and the surrounding islands are divided in three regions: Zanzibar Central/South (capital: Koani), Zanzibar North (capital: Mkokotoni), Zanzibar Urban/West (capital: Zanzibar City). Unguja belongs to Zanzibar, which is defined by the Tanzanian Constitution as "a part" of Tanzania with a high degree of autonomy. The local Zanzibari government is based in Stone Town, on the west coast of Unguja.
As of the 2012 census, the total population of Unguja was 896,721, mostly concentrated in the Zanzibar urban region. The main settlement on the island is Zanzibar City, which serves as a capital for Zanzibar and which includes the renowned historical city of Stone Town as well as other populated areas such as Michenzani. Other major settlements on Unguja include Mbweni, Mangapwani, Chwaka, and Nungwi.
Unguja is the island of the Zanzibar Archipelago that has the most developed tourism industry. This accounts for a substantial part of Unguja's economy. Agriculture (including the production of spices such as cloves) and fishing are other relevant activities. All along the east coast, most villages also rely on seaweed farming.
- Zanzibar (2007). Zanzibar strategy for growth and reduction of poverty (ZSGRP). Revolutionary Government of Zanzibar. p. 2. Retrieved 15 December 2011.
- Population Distribution by Administrative Units, United Republic of Tanzania, 2013, page 2
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