Washington, D.C. — UN urban centre
Washington, D.C.: 3,270,018 people. Reference: 2025 annual estimate · World rank #145 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 8123; 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: 38.9071, -77.0743. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 1,055,262 | Estimate |
| 1980 | 1,027,322 | Estimate |
| 1985 | 1,248,754 | Estimate |
| 1990 | 1,425,118 | Estimate |
| 1995 | 1,547,998 | Estimate |
| 2000 | 1,907,162 | Estimate |
| 2005 | 2,176,282 | Estimate |
| 2010 | 2,431,634 | Estimate |
| 2015 | 2,816,537 | Estimate |
| 2020 | 3,063,044 | Estimate |
| 2025 | 3,270,018 | Estimate |
| 2030 | 3,391,514 | Projection |
| 2035 | 3,458,682 | Projection |
| 2040 | 3,561,023 | Projection |
| 2045 | 3,676,024 | Projection |
| 2050 | 3,725,730 | Projection |
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