Sliven — UN urban centre
Sliven: 51,592 people. Reference: 2025 annual estimate · World rank #11,889 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 835; territory: Bulgaria (BGR). 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: 42.6768, 26.3301. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 84,072 | Estimate |
| 1980 | 82,983 | Estimate |
| 1985 | 82,471 | Estimate |
| 1990 | 79,806 | Estimate |
| 1995 | 72,797 | Estimate |
| 2000 | 67,178 | Estimate |
| 2005 | 65,339 | Estimate |
| 2010 | 61,095 | Estimate |
| 2015 | 56,799 | Estimate |
| 2020 | 52,321 | Estimate |
| 2025 | 51,592 | Estimate |
| 2030 | 50,578 | 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.