Sarnia — UN urban centre
Sarnia: 64,461 people. Reference: 2025 annual estimate · World rank #9,607 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 2227; territory: Canada (CAN). 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: 42.9817, -82.3778. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 63,628 | Estimate |
| 1980 | 64,253 | Estimate |
| 1985 | 64,336 | Estimate |
| 1990 | 64,188 | Estimate |
| 1995 | 64,501 | Estimate |
| 2000 | 58,975 | Estimate |
| 2005 | 57,216 | Estimate |
| 2010 | 55,930 | Estimate |
| 2015 | 57,549 | Estimate |
| 2020 | 62,904 | Estimate |
| 2025 | 64,461 | Estimate |
| 2030 | 68,102 | Projection |
| 2035 | 68,789 | Projection |
| 2040 | 69,148 | Projection |
| 2045 | 69,485 | Projection |
| 2050 | 69,626 | Projection |
Largest UN urban centres · Fastest-growing urban centres
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