Ostrava has a population of 279,791, making it the 3rd largest place we list in Czechia. It is in Moravian-Silesian Region.
Ostrava holds 2.7% of Czechia's 10,527,781 people. Prague, the largest place we list there, is 4.2 times its size. Twenty years earlier the World Gazetteer recorded 317,136, a fall of 12%.
The 2005 figure comes from the World Gazetteer archive restored on this site. The two sources may draw the settlement's boundary differently, so treat the change as indicative rather than exact. Why figures differ.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Prague | Prague | 1,165,581 |
| Brno | South Moravian | 379,466 |
| Pilsen | Plzeň Region | 168,733 |
| Liberec | Liberec Region | 102,951 |
| Olomouc | Olomouc Region | 99,496 |
Figures are the latest available in GeoNames (CC BY 4.0), which draws on national censuses of varying dates — treat them as recent, not same-year. Country totals are UN World Population Prospects 2024 (medium variant) where the UN lists the country separately; the handful it reports under a parent state keep a GeoNames figure and are marked as such. Sources & method.