Kilwa District  Kilwa is one of the five districts of the Lindi Region of Tanzania. It is bordered to the north by the Pwani Region, to the east by the Indian Ocean, to the south by the Lindi Rural District and to the west by the Liwale District. The district includes the historical sites of Kilwa Kisiwani and Songo Mnara which are part of the World Heritage and the former main town of Kilwa Kivinje. According to the 2002 Tanzania National Census, the population of the Kilwa District was 171,850. Recent (2003 through to at least 2007) developments in the area include the development of a significant natural gas field underlying the Songo Songo Island group in the Indian Ocean, and continuing efforts to locate hydrocarbon reserves (oil and/or gas) along structural trends around the Songo Songo group at least as far north as the island of Nyuni. These researches have not been completed. These developments have already made the district economically important, and as industries are developed along the pipeline route, this level of economic importance is expected to be increased, even if the other hydrocarbon searches are unsuccessful. The Kilwa District is administratively divided into 23 wards: