San Diego — UN urban centre
San Diego: 1,915,114 people. Reference: 2025 annual estimate · World rank #260 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 2295; territory: United States (USA). 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: 32.72, -117.0856. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 308,888 | Estimate |
| 1980 | 499,235 | Estimate |
| 1985 | 748,622 | Estimate |
| 1990 | 989,247 | Estimate |
| 1995 | 1,189,623 | Estimate |
| 2000 | 1,315,987 | Estimate |
| 2005 | 1,442,336 | Estimate |
| 2010 | 1,562,240 | Estimate |
| 2015 | 1,667,485 | Estimate |
| 2020 | 1,805,344 | Estimate |
| 2025 | 1,915,114 | Estimate |
| 2030 | 2,006,367 | Projection |
| 2035 | 2,086,028 | Projection |
| 2040 | 2,145,748 | Projection |
| 2045 | 2,200,466 | Projection |
| 2050 | 2,234,848 | 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.