Age composition in 2026:
| New Zealand | United Kingdom | |
|---|---|---|
| Young Population | 17.64%932,555 | 16.72%11,693,284 |
| Working Age Population | 64.32%3,401,015 | 63.34%44,295,443 |
| Elderly Population | 18.04%953,907 | 19.94%13,942,801 |
In 2026, the median age is 39.0 years in New Zealand and 41.2 years in United Kingdom.United Kingdom already reached New Zealandโs current median age in 2009, about 17 years ahead in population aging.
The total population of New Zealand peaks in 2078 at 5,867,364.The total population of United Kingdom peaks in 2072 at 76,068,380.
By 2050, the dependency ratio of New Zealand will be 64.6%, and 24.02% 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.
| New Zealand | United Kingdom | ||
|---|---|---|---|
| Demographic dividend (dependency ratio below 50%) | None between 1950 and 2100 | 1950 | |
| Aging society (65+ reaches 7%) | 1950 or earlier | 1950 or earlier | |
| Aged society (65+ reaches 14%) | 2013 38 years later | 1975 | |
| Super-aged society (65+ reaches 20%) | 2031 4 years later | 2027 |