United States vs Vietnam
United States has 3.4× the population of Vietnam: 341,784,857 vs 101,598,527, a gap of 240.2 million. Vietnam is growing faster (+0.60% vs +0.52% a year), adding about 612,685 people a year against +1,785,717. At these source-year rates the modelled relative population gap is narrowing, but too slowly to close within two centuries. United States is the older society: 18.4% aged 65+ against 9.5% in Vietnam, while Vietnam has more children (22.9% under 15 vs 17.1%). Vietnam is 8.7× as densely populated (320.2 vs 36.8 people per km²). People in United States live 4.2 years longer on average (78.9 vs 74.7). GDP per capita is 17.8× higher in United States ($90,027 vs $5,066).
Country/territory population bases: World Bank 2025 (United States) and 2025 (Vietnam); growth years 2025 / 2025. Annual source values, not live counts; years may differ. Growth is national, not local.
United States vs Vietnam — side by side
 United States |  Vietnam | |
|---|---|---|
| Population | 341,784,8572025 | 101,598,5272025 |
| Growth rate / yr | +0.52%2025 | +0.60%2025 |
| Births per 1,000 | 10.62024 | 13.42024 |
| Deaths per 1,000 | 9.02024 | 6.62024 |
| Children per woman | 1.632024 | 1.902024 |
| Life expectancy | 78.9 yrs2024 | 74.7 yrs2024 |
| Aged 0–14 | 17.1%2025 | 22.9%2025 |
| Aged 65+ | 18.4%2025 | 9.5%2025 |
| Density | 36.8 /km²2023 | 320.2 /km²2023 |
| Area | 9,831,510 km²2023 | 331,338 km²2023 |
| Urban population | 80.2%2025 | 38.8%2025 |
| Net migration / yr | +1,230,6632025 | -48,1712025 |
| GDP per capita | $90,0272025 | $5,0662025 |
| Country population rank (available records) | #3 | #16 |
| Base / world population (World Bank 2025) | 4.16% | 1.24% |
Highlighted cell = the higher value (not "better"). Small print under each value is its own data year. Source: World Bank; country/territory population bases may have different years. These are not live counts.
Population since 1960
World Bank population history (not the separate UN WPP timeline). United States: 1.9× from 1960 to 2025; Vietnam: 3.1× from 1960 to 2025. Left: absolute population. Right: each series indexed to its own first available year = 100; baseline years may differ.
More comparisons
Regions: North America · East Asia & Pacific · rankings
United States: United States vs India, United States vs China, United States vs Indonesia, United States vs Pakistan, United States vs Nigeria, United States vs Brazil, United States vs Bangladesh, United States vs Russia.
Vietnam: Vietnam vs India, Vietnam vs China, Vietnam vs United States, Vietnam vs Indonesia, Vietnam vs Pakistan, Vietnam vs Nigeria, Vietnam vs Brazil, Vietnam vs Bangladesh.
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