Age composition in 2026:
| Réunion | United Kingdom | |
|---|---|---|
| Young Population | 20.15%178,632 | 16.72%11,693,284 |
| Working Age Population | 62.99%558,304 | 63.34%44,295,443 |
| Elderly Population | 16.85%149,358 | 19.94%13,942,801 |
In 2026, the median age is 39.4 years in Réunion and 41.2 years in United Kingdom.United Kingdom already reached Réunion’s current median age in 2012, about 14 years ahead in population aging.
The total population of Réunion peaks in 2049 at 941,556.The total population of United Kingdom peaks in 2072 at 76,068,380.
By 2050, the dependency ratio of Réunion will be 79.5%, and 26.73% of the population will be elderly.By 2050, the dependency ratio of United Kingdom will be 65.9%, and 24.68% of the population will be elderly.
| Réunion | United Kingdom | ||
|---|---|---|---|
| Demographic dividend (dependency ratio below 50%) | 2002–2003 | 1950 | |
| Aging society (65+ reaches 7%) | 2000 | 1950 or earlier | |
| Aged society (65+ reaches 14%) | 2022 47 years later | 1975 | |
| Super-aged society (65+ reaches 20%) | 2031 4 years later | 2027 |