Grez-Doiceau: population and statistics
Grez-Doiceau has a population of 14,049 (2026) across 55.5 km², or 253 people per km². It ranks 266 of 565 municipalities by population. Its population is growing: +7.3% between 2016 and 2026.
- 14,049 residents
- 55.5 km²
- 253 people/km²
- 55 m
Key points
Among the 27 municipalities in Walloon Brabant, Grez-Doiceau ranks No. 11 by population.
Cars per household: 1.45 in Grez-Doiceau, compared with an average of 1.30 in Walloon Brabant and 1.07 nationally.
Largest business sector: Professional, scientific and technical, with 29.1% of the area's businesses.
A 1 kWp solar panel tilted at 39° generates about 1,077 kWh a year here.
Did you know?
- “Share of houses in the building stock”: higher than in 94% of municipalities.
- “Cars per household”: higher than in 94% of municipalities.
- “VAT-liable enterprises per 1,000 inhabitants”: higher than in 93% of municipalities.
- Its area is roughly equal to 7,780 football pitches.
- The nearest municipality is Chaumont-Gistoux, 5.5 km away.
- The nearest more populous municipality is Wavre (35,735 residents), 7.3 km away.
- A 4 kWp rooftop solar system here would generate about 4,308 kWh a year, roughly what an average household uses.
Grez-Doiceau in numbers
All indicators for Grez-Doiceau
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 | Grez-Doiceau | Walloon Brabant | National | Position | Rank |
|---|---|---|---|---|---|
| Share of inhabitants aged 65 and over (2026) | 22.1% | 21.6% | 21.7% | ranked 235 of 564 | |
| Share of inhabitants under 20 (2026) | 22.2% | 21.8% | 21.5% | ranked 193 of 564 |
Housing
| Indicator | Grez-Doiceau | Walloon Brabant | National | Position | Rank |
|---|---|---|---|---|---|
| Buildings built before 1946 (2024) | 34.5% | – | 34.6% | ranked 286 of 564 | |
| Buildings built after 2001 (2024) | 15.1% | – | 15.3% | ranked 290 of 564 | |
| Share of houses in the building stock (2024) | 86.0% | – | 79.9% | ranked 30 of 564 | |
| Number of dwellings (2024) | 5,933 | 188,756 | 5,783,434 | ranked 291 of 565 | |
| New dwellings authorised per year per 1,000 inhabitants (2021-2025) | 2.09 ‰ inh. | 2.52 ‰ inh. | 4.39 ‰ inh. | ranked 479 of 564 |
Energy
| Indicator | Grez-Doiceau | Walloon Brabant | National | Position | Rank |
|---|---|---|---|---|---|
| Residential buildings with central heating or air conditioning (2024) | 82.7% | – | 76.7% | ranked 165 of 564 |
Economy
| Indicator | Grez-Doiceau | Walloon Brabant | National | Position | Rank |
|---|---|---|---|---|---|
| VAT-liable enterprises (2024) | 1,937 | 50,462 | 1,170,010 | ranked 179 of 565 | |
| VAT-liable enterprises per 1,000 inhabitants (2024) | 137.9 ‰ inh. | 121.0 ‰ inh. | 102.2 ‰ inh. | ranked 41 of 564 | |
| Net taxable income per inhabitant (2023) | 28,605 € | 26,721 € | 24,247 € | ranked 45 of 564 | |
| Median disposable income (administrative) (2023) | 31,892 € | – | 30,830 € | ranked 169 of 551 | |
| Median selling price of houses (2025) | 415,000 € | – | 302,500 € | ranked 78 of 554 |
Transport
| Indicator | Grez-Doiceau | Walloon Brabant | National | Position | Rank |
|---|---|---|---|---|---|
| Cars per household (2025) | 1.45 | 1.30 | 1.25 | ranked 27 of 564 | |
| Households without a car (2025) | 13.3% | 18.5% | 17.6% | ranked 513 of 564 |
Society
| Indicator | Grez-Doiceau | Walloon Brabant | National | Position | Rank |
|---|---|---|---|---|---|
| Share of inhabitants of foreign nationality (2026) | 8.3% | 10.7% | 6.4% | ranked 197 of 564 | |
| Administrative poverty risk (2023) | 6.8% | 8.3% | 7.0% | ranked 290 of 551 |
Population of Grez-Doiceau over time
Grez-Doiceau had 13,088 residents in 2016 and 14,049 in 2026.
| Year | Population |
|---|---|
| 2021 | 13,984 |
| 2022 | 14,005 |
| 2023 | 14,067 |
| 2024 | 14,064 |
| 2025 | 14,014 |
| 2026 | 14,049 |
Where is Grez-Doiceau?
Business sectors: Grez-Doiceau
Share of each sector in total businesses; “×1.5” means the sector is 1.5 times more common than nationally.
- Professional, scientific and technical29.1% ×1.4
- Wholesale and retail trade11.5% ×0.8
- Construction10.8% ×0.8
- Administrative and support services8.3% ×1.3
- Information and communication6.9% ×1.2
- Other service activities5.8% ×0.9
- Health and social work4.8% ×1.0
- Manufacturing4.4% ×0.9
Sunshine and temperatures: Grez-Doiceau
Frequently asked questions
What is the population of Grez-Doiceau?
Grez-Doiceau has 14,049 residents (2026), ranking 266 of 565 municipalities.
How big is Grez-Doiceau?
Grez-Doiceau covers 55.5 km², with a density of 253 people per km².
Is the population of Grez-Doiceau growing?
Between 2016 and 2026, the population of Grez-Doiceau went from 13,088 to 14,049, a change of +7.3%.
Where is Grez-Doiceau?
Grez-Doiceau is in Walloon Brabant. It belongs to Nivelles (arrondissement). Latitude 50.733, longitude 4.700.
Share of houses in the building stock: what is the figure for Grez-Doiceau?
In Grez-Doiceau, “Share of houses in the building stock” stands at 86.0% (2024), ranking 30 of 564 municipalities; the national median is 79.9%.
Cars per household: what is the figure for Grez-Doiceau?
In Grez-Doiceau, “Cars per household” stands at 1.45 (2025), ranking 27 of 564 municipalities; the national median is 1.25.
How much electricity does a solar panel produce in Grez-Doiceau?
In Grez-Doiceau, a 1 kWp south-facing system tilted at 39° produces about 1,077 kWh a year.
Which municipalities border Grez-Doiceau?
The nearest to Grez-Doiceau are Chaumont-Gistoux (5.5 km), Incourt (6.9 km), Beauvechain (7.3 km), Wavre (7.3 km), Huldenberg (9.9 km).
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