Chiayi — UN urban centre
Chiayi: 436,393 people. Reference: 2025 annual estimate · World rank #1,280 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 12131; territory: Taiwan (TWN). 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: 23.4767, 120.4522. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 263,219 | Estimate |
| 1980 | 313,076 | Estimate |
| 1985 | 349,763 | Estimate |
| 1990 | 389,876 | Estimate |
| 1995 | 419,783 | Estimate |
| 2000 | 439,592 | Estimate |
| 2005 | 449,101 | Estimate |
| 2010 | 453,941 | Estimate |
| 2015 | 459,068 | Estimate |
| 2020 | 453,610 | Estimate |
| 2025 | 436,393 | Estimate |
| 2030 | 419,702 | Projection |
| 2035 | 400,182 | Projection |
| 2040 | 380,381 | Projection |
| 2045 | 353,478 | Projection |
| 2050 | 325,201 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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