Siwan — UN urban centre
Siwan: 300,919 people. Reference: 2025 annual estimate · World rank #1,905 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 10787; territory: India (IND). 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: 26.2222, 84.3592. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 120,214 | Estimate |
| 1980 | 125,319 | Estimate |
| 1985 | 130,436 | Estimate |
| 1990 | 138,926 | Estimate |
| 1995 | 164,875 | Estimate |
| 2000 | 195,358 | Estimate |
| 2005 | 222,264 | Estimate |
| 2010 | 247,115 | Estimate |
| 2015 | 266,377 | Estimate |
| 2020 | 285,168 | Estimate |
| 2025 | 300,919 | Estimate |
| 2030 | 322,850 | Projection |
| 2035 | 338,233 | Projection |
| 2040 | 348,254 | Projection |
| 2045 | 372,971 | Projection |
| 2050 | 384,884 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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