Ottawa — UN urban centre
Ottawa: 605,121 people. Reference: 2025 annual estimate · World rank #900 of 12,138 source urban centres. Source: UN DESA, World Urbanization Prospects 2025 (CC BY 3.0 IGO). Source identifier: 3488; 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: 45.3955, -75.7077. National context uses World Bank estimates, a separate series and geography; no national share is inferred here.
UN population series
| Year | People | Method |
|---|---|---|
| 1975 | 278,367 | Estimate |
| 1980 | 314,965 | Estimate |
| 1985 | 349,938 | Estimate |
| 1990 | 394,978 | Estimate |
| 1995 | 419,603 | Estimate |
| 2000 | 452,721 | Estimate |
| 2005 | 476,023 | Estimate |
| 2010 | 517,663 | Estimate |
| 2015 | 555,228 | Estimate |
| 2020 | 588,996 | Estimate |
| 2025 | 605,121 | Estimate |
| 2030 | 623,082 | Projection |
| 2035 | 631,582 | Projection |
| 2040 | 660,872 | Projection |
| 2045 | 712,574 | Projection |
| 2050 | 715,605 | Projection |
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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.