Municipality · Province of Hainaut · Wallonia
Seneffe
About Seneffe
Seneffe is a municipality in the province of Hainaut in Wallonia, Belgium. On 1 January 2026 it had 11,568 inhabitants on an area of 63.8 km², a population density of 181 inhabitants per km². That is lower than the average of 359 per km² in Hainaut and lower than the Belgian average of 387 per km².
By population, Seneffe ranks 321st of Belgium’s 565 municipalities and 37th of the 69 municipalities in Hainaut. By area it ranks 167th in Belgium.
The official language is French.
Population of Seneffe since 2016
Between 1 January 2016 and 1 January 2026 the population of Seneffe grew by 541 inhabitants (+4.9%), from 11,027 to 11,568. In the last year it changed by −63. The highest figure in this period was in 2025.
For population growth since 2016, Seneffe ranks 278th of 565. Over the same period the province of Hainaut changed by +2.3% and Belgium by +5.3%.
Neighbouring municipalities
Seneffe borders 8 municipalities:
Postcodes in Seneffe
Distances from Seneffe
| To | km | miles |
|---|---|---|
| Charleroi | 19 | 12 |
| Mons | 23 | 14 |
| Brussels | 37 | 23 |
| Namur | 44 | 28 |
| Leuven | 49 | 30 |
| Mechelen | 55 | 34 |
| Ghent | 70 | 43 |
| Kortrijk | 76 | 47 |
| Antwerp | 79 | 49 |
| Hasselt | 86 | 53 |
| Liège | 94 | 59 |
| Bruges | 107 | 67 |
| Ostend | 119 | 74 |
| Arlon | 146 | 91 |
Straight line between the centres of the municipalities. By road it is usually 20–40% further. Calculate another distance →
Nearby municipalities
More about Seneffe: Wikipedia.