Karko is a Hill Nubian language spoken in the northwestern Nuba Mountains in the south of Sudan. It is spoken by around 7,000 people in the Karko hills, 35 km west of Dilling, including Dulman, although Jakobi Angelika & Hamdan Ahma estimate the Karko population at up to 15,000 individuals, mostly in urban centers. Ethnologue reports that speakers of Karko are shifting to Sudanese Arabic.