The Lango ethnic group of South Sudan (distinct from the Lango of Uganda) are a community of Nilotic people in South Sudan. They are both agriculturists and nomadic.
The Lango live in the Ikwoto County area in Imatong State of South Sudan, bordering Uganda ; along the mountains of Lonyili, bordering didinga in the North east, and buya known as langarim in the far north,, the otuho in both north west and west, the acholi in the south west, the lango inhabited the areas starting from Dongotono Hills, called lomohidang in Isoke, lonyili hills in lofus,Tseretenya, Imotong, the highest mountain peak Gilo and Katire. The Lango subtribes are the Ketebo, Lokwa, Lokir, Dongotono, Imotong and Lorwana who originated from Okol and Lolim or Acholi origin from Uganda.the lorwama tribe is so distinctive among the lango sub-tribes , with their language called okolye or okolie, spoken mainly by its native and later in nineteen forties adapted by the ketebo whose language vanished as by now they become part of integral of lorwama community though they speak okolie it still varies from the original native language,the dongotono lango subtribe speaks more or less the same okolie but so much mixed with otuho language etc..
The name "Lango" can also be spelt Langa, Langgo or Langi.