The Matumbi are a Bantu ethnolinguistic group native to  Kilwa District, Lindi Region in southern Tanzania, who speak the Matumbi language. They are also the native inhabitants of the Songosongo island archipelago.
The Matumbi people are indigenous to the Kilwa District and Lindi Region of southern Tanzania, known for their language, the Matumbi language, and their presence on the Songosongo island archipelago.