As of 2025, the population of South Sudan is approximately 12.19 million people (12 188 788), making it the 80th most populous country in the dataset of 217 countries, with a 0.15% share of the combined total.
Over the past five years the population of South Sudan changed by +13.93%, and over the past ten years by +9.73%. By five-year growth, South Sudan ranks 20th of 217 countries; in terms of momentum, growth is accelerating — from -0.75% to +2.64% per year.
| Year | Population | Diff | Diff % | Share of Universe |
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