All 10 countries with the oldest population in the world have fewer men than women. This reflects the fact that the average life expectancy of women is often higher than that of men.
The top 10 in this article only count countries/territories with populations of 1 million or more to ensure representativeness.
| TT | Nation | Total population (July 1, 2021, million people) | Density (thousand people/km2) | Male to 100 female ratio | Average age | GDP per capita in 2021 (USD) |
| first | Japan | 125 | 331 | 94.6 | 48.4 | 39 622 |
| 2 | IDEA | 59 | 200 | 95.1 | 46.8 | 35 447 |
| 3 | Portugal | ten | 112 | 89.3 | 45.0 | 24 284 |
| 4 | Virtue | 83 | 239 | 97.4 | 44.9 | 50 632 |
| 5 | Hong Kong (China) | 7 | 6,819 | 85.6 | 44.9 | 49 121 |
| 6 | Greek | ten | 80 | 96.0 | 44.7 | 20 702 |
| 7 | Bulgaria | 7 | 63 | 94.2 | 44.5 | 11 657 |
| 8 | Puerto Rico | 3 | 375 | 89.5 | 44.0 | 31 676 |
| 9 | Spain | 47 | ninety four | 96.1 | 43.9 | 30 014 |
| ten | Croatia | 4 | seventy three | 94.9 | 43.7 | 16 708 |
Japan has the oldest population in the world with an average age of 48.4 years. Japan’s male to 100 female ratio is 94.6. Japan is also the most populous country in the Top 10 with 125 million people. In the world, Japan is the 11th most populous country.
In contrast, Croatia has the 10th oldest population with an average age of 43.7 years, a male to female ratio of 94.9. In the Top 10 most populous countries, Croatia has just over 4 million inhabitants, the second least in the Top.
Most of the countries with the oldest population in the world belong to the old continent Europe with a ratio of 7/10. Besides Japan, Hong Kong (China) is the second Asian territory in the Top 10. The Caribbean contributes one non-European representative, the other is Puerto Rico – a US territory. .
Most of the Top 10 countries/territories with the oldest population in the world are developed economies with the average income of people reaching more than 11 thousand USD/person/year or more. There are 3 countries in the Top 10 largest economies in the world: Japan (3rd), Germany (4th) and Italy (8th). High incomes and well-being are conditions that contribute to a high life expectancy for people in these countries, and also a low birth rate due to women’s reluctance to have children, both of which contribute to a high average age. .
Source: United Nations
