Udon Thani — UN urban centre
Udon Thani: 139,189 people. Reference: 2025 annual estimate · World rank #4,382 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 3422; territory: Thailand (THA). 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: 17.407, 102.7947. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1980 | 51,506 | Estimate |
| 1985 | 75,832 | Estimate |
| 1990 | 102,308 | Estimate |
| 1995 | 161,042 | Estimate |
| 2000 | 246,481 | Estimate |
| 2005 | 220,367 | Estimate |
| 2010 | 192,539 | Estimate |
| 2015 | 167,198 | Estimate |
| 2020 | 145,882 | Estimate |
| 2025 | 139,189 | Estimate |
| 2030 | 132,722 | Projection |
| 2035 | 126,623 | Projection |
| 2040 | 111,352 | Projection |
| 2045 | 108,842 | Projection |
| 2050 | 105,721 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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This page is a structured reference entry. Its sources, geographic definition and reference dates determine what the figures mean; it is not independent reporting about the causes of change. Read the accompanying explanation before comparing different places or vintages.