Age composition in 2026:
| Tonga | South Sudan | |
|---|---|---|
| Young Population | 34.37%35,504 | 37.09%4,612,432 |
| Working Age Population | 58.65%60,586 | 59.75%7,430,551 |
| Elderly Population | 6.99%7,216 | 3.16%393,057 |
In 2026, the median age is 22.0 years in Tonga and 20.0 years in South Sudan.Tonga already reached South Sudanโs current median age in 1999, about 27 years ahead in population aging.
The total population of Tonga is projected to keep growing until 2100, reaching 117,879.The total population of South Sudan is projected to keep growing until 2100, reaching 23,840,778.
By 2050, the dependency ratio of Tonga will be 64.9%, and 10.66% of the population will be elderly.By 2050, the dependency ratio of South Sudan will be 55.4%, and 5.91% of the population will be elderly.
| Tonga | South Sudan | ||
|---|---|---|---|
| Demographic dividend (dependency ratio below 50%) | 2064โ2070 | 2056โ2100 | |
| Aging society (65+ reaches 7%) | 2027 | 2069 42 years later | |
| Aged society (65+ reaches 14%) | 2077 | Not reached by 2100 | |
| Super-aged society (65+ reaches 20%) | 2094 | Not reached by 2100 |