As of 2016, Tanzania is divided into thirty-one regions (''mkoa''), twenty-six on the mainland and five in Zanzibar (three on  Unguja, two on Pemba). In 2012, the thirty former regions were divided into 169 districts (wilaya), also known as local government authorities. Of those districts, 34 were urban units, which were further classified as three city councils (Arusha, Mbeya, and Mwanza), nineteen municipal councils, and twelve town councils.