Nairobi — UN urban centre
Nairobi: 6,134,334 people. Reference: 2025 annual estimate · World rank #65 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 2033; territory: Kenya (KEN). 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: -1.2659, 36.8452. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 538,321 | Estimate |
| 1980 | 769,289 | Estimate |
| 1985 | 1,084,164 | Estimate |
| 1990 | 1,466,812 | Estimate |
| 1995 | 1,973,871 | Estimate |
| 2000 | 2,580,212 | Estimate |
| 2005 | 3,134,699 | Estimate |
| 2010 | 3,779,200 | Estimate |
| 2015 | 4,674,237 | Estimate |
| 2020 | 5,592,420 | Estimate |
| 2025 | 6,134,334 | Estimate |
| 2030 | 6,686,404 | Projection |
| 2035 | 7,213,354 | Projection |
| 2040 | 7,686,583 | Projection |
| 2045 | 8,086,872 | Projection |
| 2050 | 8,514,575 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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