United States vs Indonesia: population
How United States and Indonesia compare in population today and out to 2100, side by side, from UN World Population Prospects 2024.
United States and Indonesia population, 2000-2100
Population 2000-2100
Side by side
| 🇺🇸 United States | 🇮🇩 Indonesia | |
|---|---|---|
| Population today | 348 million | 287 million |
| Population 2050 | 380 million | 320 million |
| Population 2100 | 421 million | 296 million |
| World rank | #3 | #4 |
| Peak year | after 2100 | 2059 |
| Median age (2024) | 38 | 30 |
| Fertility rate (2024) | 1.62 | 2.11 |
| Life expectancy (2024) | 79 yrs | 71 yrs |
| Density (per km²) | 38 | 151 |
Why this comparison matters
The 3rd and 4th most populous countries are both still growing, but for different reasons. The United States has 1.6 births per woman and relies on net immigration, about 1.3 million people in 2024, to keep rising through 2100. Indonesia's fertility sits at the replacement level, 2.1 births per woman, and the UN projects its population to peak around 2059 and then edge down. The two never cross: the United States stays ahead throughout, and the gap widens after mid-century.
United States vs Indonesia, explained
Today United States is the larger of the two, with about 348 million people against Indonesia's 287 million. United States is the world's 3rd most populous country and Indonesia the 4th.
Their paths to 2100 differ. United States keeps growing over the century, moving from about 344 million to 421 million (+22.2%). Indonesia edges higher, going from 282 million to 296 million (+4.9%).
The order does not flip this century: United States is still the larger of the two in 2100. The two trajectories run in parallel rather than crossing.
The deeper contrast is age and fertility. United States has a median age near 38 and 1.62 births per woman, against Indonesia's 30 and 2.11. All figures follow the UN's medium-variant projection.