Kolkata — UN urban centre
Kolkata: 22,549,738 people. Reference: 2025 annual estimate · World rank #9 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 11821; 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: 22.586, 88.3537. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 10,527,605 | Estimate |
| 1980 | 11,830,220 | Estimate |
| 1985 | 13,234,849 | Estimate |
| 1990 | 14,841,167 | Estimate |
| 1995 | 16,321,060 | Estimate |
| 2000 | 18,355,286 | Estimate |
| 2005 | 19,462,171 | Estimate |
| 2010 | 20,487,403 | Estimate |
| 2015 | 21,294,623 | Estimate |
| 2020 | 22,048,672 | Estimate |
| 2025 | 22,549,738 | Estimate |
| 2030 | 23,033,107 | Projection |
| 2035 | 23,450,427 | Projection |
| 2040 | 23,644,780 | Projection |
| 2045 | 23,786,596 | Projection |
| 2050 | 23,767,882 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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