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Chamwino District is one of the seven districts of the Dodoma Region of Tanzania. Chamwino District is bordered to the north by Chemba District, to the east by Manyara Region, Kongwa District and Mpwapwa District, to the south by Iringa Region, and to the west by Singida Region, Bahi District and Dodoma District. Its administrative seat is the town of Chamwino.