The Coastal Swahili of Tanzania, numbering approximately 1,085,000 people, are Engaged yet Unreached. They are described as a people whose ethnogenesis is a relatively recent phenomenon, and ethnologists have had difficulty describing them They are an Indigenous people, with Swahili as their ethnic/kinship group and are in the Bantu, Swahili people cluster of the Sub-Saharan African Peoples. Their primary religion is Sunni Islam. They primarily speak Swahili.