The Shilluk (Shilluk: Chollo) are a major Nilotic people of Southern Sudan, living on both banks of the river Nile, in the vicinity of the city of Malakal.

Before the second Sudanese civil war the Shilluk also lived in a number of settlements on the northern bank of the Sobat River, close to where the Sobat joins the Nile, with Doleib Hill as an important mission station.The Shilluk are the third largest minority ethnic group of Southern Sudan, after the Dinka and their neighbors the Nuer.Their language, the Shilluk language (or dhok-Chollo), belongs to the Luo branch of the Western Nilotic subfamily of Nilo-Saharan.