Nauru vs San Marino
San Marino has 2.8× the population of Nauru: 34,109 vs 12,025, a gap of 22,084. Nauru is growing faster (+0.65% vs +0.39% a year), adding about 78 people a year against +132. At these source-year rates the modelled relative population gap is narrowing, but too slowly to close within two centuries. San Marino is the older society: 23.1% aged 65+ against 3.0% in Nauru, while Nauru has more children (37.2% under 15 vs 11.9%). People in San Marino live 23.5 years longer on average (85.8 vs 62.3). GDP per capita is 4.1× higher in San Marino ($59,871 vs $14,640).
Country/territory population bases: World Bank 2025 (Nauru) and 2025 (San Marino); growth years 2025 / 2025. Annual source values, not live counts; years may differ. Growth is national, not local.
Nauru vs San Marino — side by side
 Nauru |  San Marino | |
|---|---|---|
| Population | 12,0252025 | 34,1092025 |
| Growth rate / yr | +0.65%2025 | +0.39%2025 |
| Births per 1,000 | 24.62024 | 4.22024 |
| Deaths per 1,000 | 7.62024 | 7.52024 |
| Children per woman | 3.292024 | 1.162024 |
| Life expectancy | 62.3 yrs2024 | 85.8 yrs2024 |
| Aged 0–14 | 37.2%2025 | 11.9%2025 |
| Aged 65+ | 3.0%2025 | 23.1%2025 |
| Density | 593.8 /km²2023 | 564.3 /km²2023 |
| Area | 20 km²2023 | 60 km²2023 |
| Urban population | 100.0%2025 | 97.2%2025 |
| Net migration / yr | -1222025 | +1222025 |
| GDP per capita | $14,6402025 | $59,8712023 |
| Country population rank (available records) | #216 | #213 |
| Base / world population (World Bank 2025) | 0.00% | 0.00% |
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). Nauru: 2.6× from 1960 to 2025; San Marino: 2.2× 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: East Asia & Pacific · Europe & Central Asia · rankings
Nauru: Nauru vs San Marino, Nauru vs Saint Martin, Nauru vs Palau, Nauru vs Tuvalu.
San Marino: San Marino vs British Virgin Islands, San Marino vs Monaco, San Marino vs Marshall Islands, San Marino vs Saint Martin, San Marino vs Palau, San Marino vs Nauru.
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This page is a structured reference entry. Its sources, geographic definition and reference dates determine what the figures mean; it is not independent reporting about the causes of change. Read the accompanying explanation before comparing different places or vintages.