San Francisco — UN urban centre
San Francisco: 3,163,486 people. Reference: 2025 annual estimate · World rank #155 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 1233; 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: 37.7908, -122.6252. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 2,136,513 | Estimate |
| 1980 | 2,303,392 | Estimate |
| 1985 | 2,462,695 | Estimate |
| 1990 | 2,643,725 | Estimate |
| 1995 | 2,741,579 | Estimate |
| 2000 | 2,836,968 | Estimate |
| 2005 | 2,893,112 | Estimate |
| 2010 | 2,963,104 | Estimate |
| 2015 | 3,047,712 | Estimate |
| 2020 | 3,122,361 | Estimate |
| 2025 | 3,163,486 | Estimate |
| 2030 | 3,219,679 | Projection |
| 2035 | 3,244,669 | Projection |
| 2040 | 3,265,085 | Projection |
| 2045 | 3,281,086 | Projection |
| 2050 | 3,290,101 | Projection |
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