The Republic of South Sudan population is estimated to be 12,778,250 in 2019 with Juba as the capital and largest city in the country.

South Sudan is populated by about 64 ethnic groups. The Dinka are the largest ethnic group recorded, followed by the Nuer as the second largest tribe in South Sudan, the Shilluk follows as the third in number. it's disputed that Bari is 4th according to their territory which is Juba county. Zande, also known as Azande, are the fifth largest tribe in South Sudan with a total population of 100,000 followed by Balanda with a population of 80,000.