They are a total of 64 South Sudanese tribes
Acholi
Adio (Makaraka)
Aja
Anyuak (Anyuaa)
Atuot (Reel)
Avukaya
Azande
Bai
Baka
Balanda-Boor
Balanda-Bviri
Banda
Bari
Binga
Bongo
Didinga
Dinka (Jieng)
Dongotona
Feroghe
Gollo
Ifoto
Imatong
Indri
Jiye
Jur (Beli