980,000 (2006). 73% are in the traditional area.
Northwest central, Tabora Region, between Lake Victoria and Lake Rukwa; Rukwa, Singida, and Shinyanga regions.
Smaller groups (Konongo, Galla, Sumbwa) were part of Unyamwezi Kingdom and are still often considered part of the Nyamwezi people group by the Nyamwezi. Christian, traditional religion, Muslim.