Bariadi District is one of the five districts of the Simiyu Region of Tanzania, East Africa. As of 2002, the population was 605,509. History Prior to 2012, Bariadi District was part of Shinyanga Region. Economy The Dutwa Ward contains one of the world's largest nickel deposits. Wards As of 2002, Bariadi District was administratively divided into twenty-six wards: Bariadi Bumera Bunamhala Chinamili Dutwa Gamboshi Ikungulyabashashi Kasoli Kinang'weli Lagangabilili Lugulu Mbita Mhango Mhunze Mwadobana Mwamapalala Mwaswale Mwaubingi Nkololo Nkoma Nyakabindi Sagata Sakwe Sapiwi Somanda Zagayu Notes Districts of Simiyu Region sw:Bariadi