San Juan — UN urban centre
San Juan: 681,030 people. Reference: 2025 annual estimate · World rank #793 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 8242; territory: Puerto Rico (PRI). UN source workbook.
Method: Degree of Urbanisation (contiguous 1 km2 cells, density 1,500+ people/km2, total 50,000+). This is a source-defined urban centre, not a municipality or province. No association with a separate administrative entity is inferred from proximity or name.
Source centroid: 18.3937, -66.0786. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 343,658 | Estimate |
| 1980 | 421,975 | Estimate |
| 1985 | 618,712 | Estimate |
| 1990 | 899,794 | Estimate |
| 1995 | 912,763 | Estimate |
| 2000 | 925,304 | Estimate |
| 2005 | 886,051 | Estimate |
| 2010 | 859,355 | Estimate |
| 2015 | 834,210 | Estimate |
| 2020 | 686,947 | Estimate |
| 2025 | 681,030 | Estimate |
| 2030 | 657,066 | Projection |
| 2035 | 630,521 | Projection |
| 2040 | 607,298 | Projection |
| 2045 | 571,337 | Projection |
| 2050 | 531,956 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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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.