Nilotic peoples are peoples indigenous to the Nile Valley that speak Nilotic languages, which comprise a large sub-group of the Nilo-Saharan languages and are spoken in South Sudan, Uganda, Kenya, and northern Tanzania and including Masai. The Nilotic peoples include the Luo, Kalenjin, Dinka, Nuer, Shilluk, Ateker, and the Maa-speaking peoples, each of which is a cluster of several ethnic groups.