L1 users: 7,300,000 (2013 J. Leclerc), increasing.
Shinyanga, Geita, and Mwanza regions; Kagera, Tabora, Simiyu, and Singida regions; some in Kigoma and Mara regions; between Lake Victoria and Lake Rukwa, to Serengeti plain, Kiya, Gwe; few in cities, 88% in the traditional area.
Kiya (East Sukuma, Jinakiiya, Kemunakeeya, Kiiya, Kimunakiiya), Gwe (Kemunangweeli, Kigwe, West Sukuma), Kemunadakama (South Sukuma), Nasa (Kinaanasa), SumaaBu (KisumaaBu), Nelaa (Kinaanelaa), Ntuzu (Gina-Ntuzu, Kimunantuzu), Kemunasukuma (Kimuna-Sukuma, North Sukuma). Dialects contiguous with Nyamwezi and mutually intelligible along the border of the two people groups. Lexical similarity: 84% with Nyamwezi [nym], 59% with Sumbwa [suw] and Nyaturu [rim], 57% with Kimbu [kiv], 55% with Nilamba [nim], 49% with Langi [lag].
Latin script [Latn].
Christian, traditional religion.