Trooz: population and statistics
Trooz has a population of 8,290 (2026) across 24.3 km², or 342 people per km². It ranks 404 of 565 municipalities by population. Its population is growing: +0.9% between 2016 and 2026.
- 8,290 residents
- 24.3 km²
- 342 people/km²
- 113 m
Key points
Among the 84 municipalities in Liège, Trooz ranks No. 41 by population.
Share of inhabitants aged 65 and over: 18.7% in Trooz, compared with an average of 20.6% in Liège and 20.7% nationally.
Largest business sector: Professional, scientific and technical, with 19.9% of the area's businesses.
A 1 kWp solar panel tilted at 38° generates about 1,035 kWh a year here.
Did you know?
- Its area is roughly equal to 3,398 football pitches.
- The nearest more populous municipality is Chaudfontaine (20,525 residents), 4.0 km away.
- A 4 kWp rooftop solar system here would generate about 4,140 kWh a year, roughly what an average household uses.
Trooz in numbers
All indicators for Trooz
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 | Trooz | Liège | National | Position | Rank |
|---|---|---|---|---|---|
| Share of inhabitants aged 65 and over (2026) | 18.7% | 20.6% | 21.7% | ranked 480 of 564 | |
| Share of inhabitants under 20 (2026) | 23.1% | 22.2% | 21.5% | ranked 106 of 564 |
Housing
| Indicator | Trooz | Liège | National | Position | Rank |
|---|---|---|---|---|---|
| Buildings built before 1946 (2024) | 53.2% | – | 34.6% | ranked 80 of 564 | |
| Buildings built after 2001 (2024) | 9.7% | – | 15.3% | ranked 469 of 564 | |
| Share of houses in the building stock (2024) | 78.2% | – | 79.9% | ranked 360 of 564 | |
| Number of dwellings (2024) | 3,949 | 549,948 | 5,783,434 | ranked 393 of 565 | |
| New dwellings authorised per year per 1,000 inhabitants (2021-2025) | 2.32 ‰ inh. | 2.72 ‰ inh. | 4.39 ‰ inh. | ranked 471 of 564 |
Energy
| Indicator | Trooz | Liège | National | Position | Rank |
|---|---|---|---|---|---|
| Residential buildings with central heating or air conditioning (2024) | 66.4% | – | 76.7% | ranked 466 of 564 |
Economy
| Indicator | Trooz | Liège | National | Position | Rank |
|---|---|---|---|---|---|
| VAT-liable enterprises (2024) | 718 | 89,330 | 1,170,010 | ranked 439 of 565 | |
| VAT-liable enterprises per 1,000 inhabitants (2024) | 86.6 ‰ inh. | 79.4 ‰ inh. | 102.2 ‰ inh. | ranked 417 of 564 | |
| Net taxable income per inhabitant (2023) | 23,415 € | 21,639 € | 24,247 € | ranked 342 of 564 | |
| Median disposable income (administrative) (2023) | 29,308 € | – | 30,830 € | ranked 409 of 551 | |
| Median selling price of houses (2025) | 230,000 € | – | 302,500 € | ranked 457 of 554 |
Transport
| Indicator | Trooz | Liège | National | Position | Rank |
|---|---|---|---|---|---|
| Cars per household (2025) | 1.26 | 1.11 | 1.25 | ranked 258 of 564 | |
| Households without a car (2025) | 18.2% | 25.4% | 17.6% | ranked 254 of 564 |
Society
| Indicator | Trooz | Liège | National | Position | Rank |
|---|---|---|---|---|---|
| Share of inhabitants of foreign nationality (2026) | 6.4% | 11.6% | 6.4% | ranked 281 of 564 | |
| Administrative poverty risk (2023) | 10.2% | 14.1% | 7.0% | ranked 125 of 551 |
Population of Trooz over time
Trooz had 8,215 residents in 2016 and 8,290 in 2026.
| Year | Population |
|---|---|
| 2021 | 8,312 |
| 2022 | 7,822 |
| 2023 | 7,871 |
| 2024 | 8,058 |
| 2025 | 8,200 |
| 2026 | 8,290 |
Where is Trooz?
Business sectors: Trooz
Share of each sector in total businesses; “×1.5” means the sector is 1.5 times more common than nationally.
- Professional, scientific and technical19.9% ×1.0
- Construction14.9% ×1.1
- Wholesale and retail trade13.6% ×0.9
- Other service activities9.2% ×1.4
- Manufacturing7.4% ×1.5
- Health and social work7.2% ×1.6
- Administrative and support services6.0% ×0.9
- Accommodation and food services4.6% ×0.8
Sunshine and temperatures: Trooz
Frequently asked questions
What is the population of Trooz?
Trooz has 8,290 residents (2026), ranking 404 of 565 municipalities.
How big is Trooz?
Trooz covers 24.3 km², with a density of 342 people per km².
Is the population of Trooz growing?
Between 2016 and 2026, the population of Trooz went from 8,215 to 8,290, a change of +0.9%.
Where is Trooz?
Trooz is in Liège. It belongs to Liège (arrondissement). Latitude 50.574, longitude 5.687.
Share of inhabitants aged 65 and over: what is the figure for Trooz?
In Trooz, “Share of inhabitants aged 65 and over” stands at 18.7% (2026), ranking 480 of 564 municipalities; the national median is 21.7%.
Buildings built before 1946: what is the figure for Trooz?
In Trooz, “Buildings built before 1946” stands at 53.2% (2024), ranking 80 of 564 municipalities; the national median is 34.6%.
How much electricity does a solar panel produce in Trooz?
In Trooz, a 1 kWp south-facing system tilted at 38° produces about 1,035 kWh a year.
Which municipalities border Trooz?
The nearest to Trooz are Chaudfontaine (4.0 km), Olne (4.6 km), Fléron (4.8 km), Beyne-Heusay (5.5 km), Soumagne (6.5 km).