Portsmouth — UN urban centre
Portsmouth: 488,385 people. Reference: 2025 annual estimate · World rank #1,137 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 5388; territory: United Kingdom (GBR). 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: 50.8303, -1.0863. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 373,440 | Estimate |
| 1980 | 385,692 | Estimate |
| 1985 | 391,358 | Estimate |
| 1990 | 398,926 | Estimate |
| 1995 | 404,411 | Estimate |
| 2000 | 411,340 | Estimate |
| 2005 | 421,939 | Estimate |
| 2010 | 440,591 | Estimate |
| 2015 | 456,493 | Estimate |
| 2020 | 463,728 | Estimate |
| 2025 | 488,385 | Estimate |
| 2030 | 521,607 | Projection |
| 2035 | 530,682 | Projection |
| 2040 | 546,026 | Projection |
| 2045 | 553,183 | Projection |
| 2050 | 558,084 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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