Seattle — UN urban centre
Seattle: 1,403,495 people. Reference: 2025 annual estimate · World rank #359 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 5386; 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: 47.6708, -122.2971. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 195,151 | Estimate |
| 1980 | 288,354 | Estimate |
| 1985 | 337,285 | Estimate |
| 1990 | 388,988 | Estimate |
| 1995 | 464,003 | Estimate |
| 2000 | 720,167 | Estimate |
| 2005 | 851,419 | Estimate |
| 2010 | 986,952 | Estimate |
| 2015 | 1,140,269 | Estimate |
| 2020 | 1,307,569 | Estimate |
| 2025 | 1,403,495 | Estimate |
| 2030 | 1,469,239 | Projection |
| 2035 | 1,509,837 | Projection |
| 2040 | 1,605,918 | Projection |
| 2045 | 1,645,481 | Projection |
| 2050 | 1,727,219 | Projection |
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