Sirajganj — UN urban centre
Sirajganj: 446,632 people. Reference: 2025 annual estimate · World rank #1,245 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 5239; territory: Bangladesh (BGD). 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: 24.4456, 89.7007. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 268,235 | Estimate |
| 1980 | 271,437 | Estimate |
| 1985 | 268,575 | Estimate |
| 1990 | 270,421 | Estimate |
| 1995 | 289,500 | Estimate |
| 2000 | 328,045 | Estimate |
| 2005 | 365,463 | Estimate |
| 2010 | 376,610 | Estimate |
| 2015 | 412,055 | Estimate |
| 2020 | 423,074 | Estimate |
| 2025 | 446,632 | Estimate |
| 2030 | 526,624 | Projection |
| 2035 | 547,558 | Projection |
| 2040 | 560,970 | Projection |
| 2045 | 568,160 | Projection |
| 2050 | 573,283 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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