Tanzania vs United States
United States has 4.8× the population of Tanzania: 341,784,857 vs 70,545,865, a gap of 271.2 million. Tanzania is growing faster (+2.86% vs +0.52% a year), adding about 2,014,190 people a year against +1,785,717. Using continuous exponential growth from the stated base year, if these rates held, Tanzania would overtake United States in about 68 years (from the 2025 population bases, around 2093) — a projection, not a forecast. United States is the older society: 18.4% aged 65+ against 3.0% in Tanzania, while Tanzania has more children (42.3% under 15 vs 17.1%). Tanzania is 2.0× as densely populated (75.2 vs 36.8 people per km²). People in United States live 11.7 years longer on average (78.9 vs 67.2). GDP per capita is 68.3× higher in United States ($90,027 vs $1,319).
Country/territory population bases: World Bank 2025 (Tanzania) and 2025 (United States); growth years 2025 / 2025. Annual source values, not live counts; years may differ. Growth is national, not local.
Tanzania vs United States — side by side
 Tanzania |  United States | |
|---|---|---|
| Population | 70,545,8652025 | 341,784,8572025 |
| Growth rate / yr | +2.86%2025 | +0.52%2025 |
| Births per 1,000 | 34.82024 | 10.62024 |
| Deaths per 1,000 | 5.72024 | 9.02024 |
| Children per woman | 4.542024 | 1.632024 |
| Life expectancy | 67.2 yrs2024 | 78.9 yrs2024 |
| Aged 0–14 | 42.3%2025 | 17.1%2025 |
| Aged 65+ | 3.0%2025 | 18.4%2025 |
| Density | 75.2 /km²2023 | 36.8 /km²2023 |
| Area | 947,300 km²2023 | 9,831,510 km²2023 |
| Urban population | 36.9%2025 | 80.2%2025 |
| Net migration / yr | -12,7302025 | +1,230,6632025 |
| GDP per capita | $1,3192025 | $90,0272025 |
| Country population rank (available records) | #21 | #3 |
| Base / world population (World Bank 2025) | 0.86% | 4.16% |
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). Tanzania: 7.1× from 1960 to 2025; United States: 1.9× 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: Sub-Saharan Africa · North America · rankings
Tanzania: Tanzania vs India, Tanzania vs China, Tanzania vs United States, Tanzania vs Indonesia, Tanzania vs Pakistan, Tanzania vs Nigeria, Tanzania vs Brazil, Tanzania vs Bangladesh.
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.
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