Approximately 36.7 million people. Among them: 99% African descent, 1% of Asians, Europeans and Arabs. About 94% of the rural population of mainland speak Bantu languages. The most numerous people - Sukuma, he focuses on the north-west and is 13% of mainland Tanzania. Other tribes - Nyamwezi, Macondo, Haya, Chaga, Gogo. Other nations mainland - mainly pastoralists speaking Chari-Nile languages. Several small ethnic groups, including the Sandawe and hadsa, speak Khoisan languages. Most of the people of Zanzibar are descendants of African slaves brought by the Arabs from the mainland, and the people Shirazi, whose ancestors many centuries ago came from Iran and mingled with the local population.