Iran vs Tanzania
Iran has 1.3× the population of Tanzania: 92,417,681 vs 70,545,865, a gap of 21.9 million. Tanzania is growing faster (+2.86% vs +0.92% a year), adding about 2,014,190 people a year against +853,875. Using continuous exponential growth from the stated base year, if these rates held, Tanzania would overtake Iran in about 14 years (from the 2025 population bases, around 2039) — a projection, not a forecast. Iran is the older society: 8.6% aged 65+ against 3.0% in Tanzania, while Tanzania has more children (42.3% under 15 vs 22.0%). Tanzania is 1.3× as densely populated (75.2 vs 55.8 people per km²). People in Iran live 10.6 years longer on average (77.9 vs 67.2). GDP per capita is 3.0× higher in Iran ($3,924 vs $1,319).
Country/territory population bases: World Bank 2025 (Iran) and 2025 (Tanzania); growth years 2025 / 2025. Annual source values, not live counts; years may differ. Growth is national, not local.
Iran vs Tanzania — side by side
 Iran |  Tanzania | |
|---|---|---|
| Population | 92,417,6812025 | 70,545,8652025 |
| Growth rate / yr | +0.92%2025 | +2.86%2025 |
| Births per 1,000 | 12.62024 | 34.82024 |
| Deaths per 1,000 | 4.82024 | 5.72024 |
| Children per woman | 1.682024 | 4.542024 |
| Life expectancy | 77.9 yrs2024 | 67.2 yrs2024 |
| Aged 0–14 | 22.0%2025 | 42.3%2025 |
| Aged 65+ | 8.6%2025 | 3.0%2025 |
| Density | 55.8 /km²2023 | 75.2 /km²2023 |
| Area | 1,745,150 km²2023 | 947,300 km²2023 |
| Urban population | 77.4%2025 | 36.9%2025 |
| Net migration / yr | +116,7862025 | -12,7302025 |
| GDP per capita | $3,9242025 | $1,3192025 |
| Country population rank (available records) | #17 | #21 |
| Base / world population (World Bank 2025) | 1.12% | 0.86% |
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). Iran: 4.3× from 1960 to 2025; Tanzania: 7.1× 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: Middle East, North Africa, Afghanistan & Pakistan · Sub-Saharan Africa · rankings
Iran: Iran vs India, Iran vs China, Iran vs United States, Iran vs Indonesia, Iran vs Pakistan, Iran vs Nigeria, Iran vs Brazil, Iran vs Bangladesh.
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.
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