Olen's 2026 population is now estimated at 12,989.In 2009, the population of Olen was 11,655.Olen has grown by 74 in the last year, which represents a 0.57% annual change.These population values and projections come from Statbel - Population by place of residence, nationality, marital status, age and sex and World Population Review Internal Projections.
City | 2026 Pop.↓ | Growth |
|---|---|---|
| Brussels | 1,264,392 | 0.68% |
| Antwerp | 568,485 | 1.15% |
| Ghent | 274,536 | 0.69% |
| Charleroi | 206,454 | 0.34% |
| Liege | 197,295 | -0.01% |
| Anderlecht | 130,378 | 1.28% |
| Schaerbeek | 129,263 | -0.39% |
| Bruges | 120,669 | 0.32% |
| Namur | 115,797 | 0.67% |
| Leuven | 105,572 | 0.63% |
| Molenbeek-Saint-Jean | 98,857 | 0.15% |
| Mons | 97,352 | 0.24% |
| Aalst | 93,143 | 1.1% |
| Ixelles | 90,425 | 0.59% |
| Mechelen | 90,311 | 0.73% |
| Hasselt | 90,249 | 0% |
| Beveren-Kruibeke-Zwijndrecht | 87,927 | 0% |
| Uccle | 87,871 | 0.78% |
| Sint-Niklaas | 83,519 | 1.04% |
| La Louviere | 81,788 | 0.14% |
