Bariadi District is one of the five districts of the Simiyu Region of Tanzania, East Africa. As of 2022, the population was 383,385. Prior to 2012, B…Bariadi District is one of the five districts of the Simiyu Region of Tanzania, East Africa. As of 2022, the population was 383,385. Prior to 2012, Bariadi District was part of Shinyanga Region. The Dutwa Ward contains one of the world's largest nickel deposits.
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