[1] Tanzania is divided into thirty-one regions (mkoa in Swahili).

The villages may be further subdivided into hamlets (kitongoji in Swahili).

In 1922 under the British Tanganyika was divided into twenty-two regions, known as "divisions": Arusha, Bagamoyo, Bukoba, Dar es Salaam, Dodoma, Iringa, Kilwa, Kondoa-Irangi, Lindi, Mahenge, Morogoro, Moshi, Mwanza, Pangani, Rufiji, Rungwe, Songea, Tabora, Tanga, Ufipa, Ujiji, and Usambara.

A village is the lowest government administrative structure at the community level.

In an urban area, a cluster (mtaa) can include a number of streets.