Age composition in 2026:
| Sao Tome and Principe | Sierra Leone | |
|---|---|---|
| Young Population | 37.16%91,050 | 37.21%3,347,406 |
| Working Age Population | 58.83%144,144 | 59.46%5,349,766 |
| Elderly Population | 4.00%9,806 | 3.33%299,577 |
In 2026, the median age is 20.7 years in Sao Tome and Principe and 20.9 years in Sierra Leone.Sierra Leone already reached Sao Tome and Principeโs current median age in 1953, about 73 years ahead in population aging.
The total population of Sao Tome and Principe is projected to keep growing until 2100, reaching 534,018.The total population of Sierra Leone peaks in 2092 at 16,009,634.
By 2050, the dependency ratio of Sao Tome and Principe will be 58.5%, and 6.70% of the population will be elderly.By 2050, the dependency ratio of Sierra Leone will be 50.8%, and 5.50% of the population will be elderly.
| Sao Tome and Principe | Sierra Leone | ||
|---|---|---|---|
| Demographic dividend (dependency ratio below 50%) | None between 1950 and 2100 | 2053โ2085 | |
| Aging society (65+ reaches 7%) | 2053 | 2060 7 years later | |
| Aged society (65+ reaches 14%) | 2085 | 2092 7 years later | |
| Super-aged society (65+ reaches 20%) | Not reached by 2100 | Not reached by 2100 |