Sint-Niklaas has a population of 69,010, making it the 23rd largest place we list in Belgium. It is in Flanders.
Sint-Niklaas holds 0.59% of Belgium's 11,774,642 people. Brussels, the largest place we list there, is 15 times its size. The World Gazetteer published 69,010 for Sint-Niklaas in 2005 and GeoNames still carries that same figure, so there is no measured change to report.
The 2005 figure comes from the World Gazetteer archive restored on this site. Why figures differ.
Nearby in size
| Place | Region | Population |
|---|---|---|
| Kortrijk | Flanders | 73,879 |
| Tournai | Wallonia | 69,554 |
| Ostend | Flanders | 69,011 |
| Genk | Flanders | 63,666 |
| Seraing | Wallonia | 60,737 |
| Woluwe-Saint-Lambert | Brussels Capital | 56,584 |
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.