Seneffe: population and statistics
Seneffe has a population of 11,568 (2026) across 63.8 km², or 181 people per km². It ranks 321 of 565 municipalities by population. Its population is growing: +4.9% between 2016 and 2026.
- 11,568 residents
- 63.8 km²
- 181 people/km²
- 119 m
Key points
Among the 69 municipalities in Hainaut, Seneffe ranks No. 37 by population.
New dwellings authorised per year per 1,000 inhabitants: 1.71 ‰ inh. in Seneffe, compared with an average of 2.06 ‰ inh. in Hainaut and 4.28 ‰ inh. nationally.
Largest business sector: Professional, scientific and technical, with 21.0% of the area's businesses.
A 1 kWp solar panel tilted at 39° generates about 1,078 kWh a year here.
Did you know?
- Number 1 in Hainaut for “VAT-liable enterprises per 1,000 inhabitants”.
- “New dwellings authorised per year per 1,000 inhabitants”: lower than in 91% of municipalities.
- Its area is roughly equal to 8,931 football pitches.
- Its population density is 2.1 times lower than the national average.
- The nearest more populous municipality is Manage (24,249 residents), 3.9 km away.
- A 4 kWp rooftop solar system here would generate about 4,312 kWh a year, roughly what an average household uses.
Seneffe in numbers
All indicators for Seneffe
Value for the municipality, then the regional average and the national median (for counts: regional and national totals). The gauge places the municipality between the lowest and highest value in the country.
Population
| Indicator | Seneffe | Hainaut | National | Position | Rank |
|---|---|---|---|---|---|
| Share of inhabitants aged 65 and over (2026) | 20.9% | 20.4% | 21.7% | ranked 348 of 564 | |
| Share of inhabitants under 20 (2026) | 22.0% | 22.3% | 21.5% | ranked 220 of 564 |
Housing
| Indicator | Seneffe | Hainaut | National | Position | Rank |
|---|---|---|---|---|---|
| Buildings built before 1946 (2024) | 49.3% | – | 34.6% | ranked 119 of 564 | |
| Buildings built after 2001 (2024) | 11.3% | – | 15.3% | ranked 429 of 564 | |
| Share of houses in the building stock (2024) | 78.1% | – | 79.9% | ranked 366 of 564 | |
| Number of dwellings (2024) | 5,353 | 659,990 | 5,783,434 | ranked 318 of 565 | |
| New dwellings authorised per year per 1,000 inhabitants (2021-2025) | 1.71 ‰ inh. | 2.06 ‰ inh. | 4.39 ‰ inh. | ranked 514 of 564 |
Energy
| Indicator | Seneffe | Hainaut | National | Position | Rank |
|---|---|---|---|---|---|
| Residential buildings with central heating or air conditioning (2024) | 71.2% | – | 76.7% | ranked 399 of 564 |
Economy
| Indicator | Seneffe | Hainaut | National | Position | Rank |
|---|---|---|---|---|---|
| VAT-liable enterprises (2024) | 1,337 | 90,576 | 1,170,010 | ranked 279 of 565 | |
| VAT-liable enterprises per 1,000 inhabitants (2024) | 115.6 ‰ inh. | 66.2 ‰ inh. | 102.2 ‰ inh. | ranked 157 of 564 | |
| Net taxable income per inhabitant (2023) | 25,273 € | 20,382 € | 24,247 € | ranked 219 of 564 | |
| Median disposable income (administrative) (2023) | 30,241 € | – | 30,830 € | ranked 335 of 551 | |
| Median selling price of houses (2025) | 270,000 € | – | 302,500 € | ranked 375 of 554 | |
| Median selling price of apartments (2025) | 213,000 € | – | 249,900 € | ranked 234 of 299 |
Transport
| Indicator | Seneffe | Hainaut | National | Position | Rank |
|---|---|---|---|---|---|
| Cars per household (2025) | 1.31 | 1.08 | 1.25 | ranked 167 of 564 | |
| Households without a car (2025) | 17.0% | 26.4% | 17.6% | ranked 313 of 564 |
Society
| Indicator | Seneffe | Hainaut | National | Position | Rank |
|---|---|---|---|---|---|
| Share of inhabitants of foreign nationality (2026) | 6.2% | 12.7% | 6.4% | ranked 293 of 564 | |
| Administrative poverty risk (2023) | 9.3% | 14.8% | 7.0% | ranked 151 of 551 |
Population of Seneffe over time
Seneffe had 11,027 residents in 2016 and 11,568 in 2026.
| Year | Population |
|---|---|
| 2021 | 11,407 |
| 2022 | 11,465 |
| 2023 | 11,520 |
| 2024 | 11,624 |
| 2025 | 11,631 |
| 2026 | 11,568 |
Where is Seneffe?
Business sectors: Seneffe
Share of each sector in total businesses; “×1.5” means the sector is 1.5 times more common than nationally.
- Professional, scientific and technical21.0% ×1.0
- Construction14.4% ×1.1
- Wholesale and retail trade13.2% ×0.9
- Administrative and support services8.2% ×1.3
- Manufacturing6.4% ×1.3
- Agriculture, forestry and fishing6.0% ×1.4
- Health and social work5.8% ×1.3
- Other service activities5.3% ×0.8
Sunshine and temperatures: Seneffe
Frequently asked questions
What is the population of Seneffe?
Seneffe has 11,568 residents (2026), ranking 321 of 565 municipalities.
How big is Seneffe?
Seneffe covers 63.8 km², with a density of 181 people per km².
Is the population of Seneffe growing?
Between 2016 and 2026, the population of Seneffe went from 11,027 to 11,568, a change of +4.9%.
Where is Seneffe?
Seneffe is in Hainaut. It belongs to Soignies (arrondissement). Latitude 50.533, longitude 4.250.
New dwellings authorised per year per 1,000 inhabitants: what is the figure for Seneffe?
In Seneffe, “New dwellings authorised per year per 1,000 inhabitants” stands at 1.71 ‰ inh. (2021-2025), ranking 514 of 564 municipalities; the national median is 4.39 ‰ inh..
Median selling price of apartments: what is the figure for Seneffe?
In Seneffe, “Median selling price of apartments” stands at 213,000 € (2025), ranking 234 of 299 municipalities; the national median is 249,900 €.
How much electricity does a solar panel produce in Seneffe?
In Seneffe, a 1 kWp south-facing system tilted at 39° produces about 1,078 kWh a year.
Which municipalities border Seneffe?
The nearest to Seneffe are Manage (3.9 km), Ecaussinnes (6.0 km), La Louvière (7.6 km), Chapelle-lez-Herlaimont (7.8 km), Pont-à-Celles (8.4 km).
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