United States of America vs Republic of Korea: population pyramids in 2009
United States of AmericaRepublic of Korea
Each bar is the share of the total population at that single year of age (men left, women right), so countries of different sizes can be compared.
United States of America and Republic of Korea compared
In 2009, the United States of America has a population of 306.5 million and the Republic of Korea 48.4 million; the United States of America is about 6.3 times the size of the Republic of Korea.
The share aged 65 and over is 12.6% in the United States of America and 10.4% in the Republic of Korea, 2.1 points higher in the United States of America. The median age is 36.8 years in the United States of America and 36.7 years in the Republic of Korea.
The total fertility rate is 1.99 in the United States of America and 1.18 in the Republic of Korea, both below the replacement level of about 2.1. Life expectancy at birth is 78.5 years in the United States of America and 80.5 years in the Republic of Korea.
By 2050, the population of the United States of America is projected to grow by 24.1% and that of the Republic of Korea to shrink by 6.5% compared with 2009.
GDP per person is $90K in the United States of America (2025) and $36K in the Republic of Korea (2025).
Key figures (2009)
| United States of America | Republic of Korea | |
|---|---|---|
| Population | 306.5 million | 48.4 million |
| Aged 0–14 | 19.9% | 17.2% |
| Aged 15–64 | 67.6% | 72.4% |
| Aged 65+ | 12.6% | 10.4% |
| Median age | 36.8 yrs | 36.7 yrs |
| Old-age dependency | 18.6 | 14.4 |
| Total fertility rate | 1.99 | 1.18 |
| Life expectancy | 78.5 yrs | 80.5 yrs |
| Population growth | +0.98% | +0.41% |
| Net migration (per year) | +1.4 million | +5,308 |
| GDP | $30.8T (2025) | $1.87T (2025) |
| GDP per person | $90K (2025) | $36K (2025) |
| Unemployment | 4.2% (2025) | 2.7% (2025) |
Economic figures are the latest year published for each country.