Onitsha — UN urban centre
Onitsha: 5,627,706 people. Reference: 2025 annual estimate · World rank #69 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 7330; territory: Nigeria (NGA). 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: 6.1735, 6.8205. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 756,883 | Estimate |
| 1980 | 1,009,940 | Estimate |
| 1985 | 1,344,335 | Estimate |
| 1990 | 1,712,930 | Estimate |
| 1995 | 1,983,208 | Estimate |
| 2000 | 2,353,086 | Estimate |
| 2005 | 2,790,861 | Estimate |
| 2010 | 3,404,599 | Estimate |
| 2015 | 4,139,918 | Estimate |
| 2020 | 4,959,680 | Estimate |
| 2025 | 5,627,706 | Estimate |
| 2030 | 6,297,766 | Projection |
| 2035 | 6,902,795 | Projection |
| 2040 | 7,539,263 | Projection |
| 2045 | 8,166,086 | Projection |
| 2050 | 8,680,997 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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