Kilwa Kisiwani is an island, national historic site, and hamlet community located in the township of Kilwa Masoko, the district seat of Kilwa District in the Tanzanian region of Lindi Region in southern Tanzania. Kilwa Kisiwani is the largest of the nine hamlets in the town Kilwa Masoko and is also the least populated hamlet in the township with less than 1,000 residents. At its peak Kilwa hosted over 10,000 inhabitants in the Middle Ages. Since 1981 the entire island of Kilwa Kisiwani has been designated by UNESCO as a World Heritage Site along with the nearby ruins of Songo Mnara. Despite its significant historic reputation, Kilwa Kisiwani is still home to a small and resilient community of native residents that have inhabited the island for centuries. Kilwa Kisiwani is one the seven World Heritage Site located in Tanzania.