Trey: population and statistics
Trey has a population of 305 (2025) across 3.8 km², or 80.5 people per km². It ranks 1,963 of 2,115 municipalities by population. Its population is growing: +19.1% between 2015 and 2025.
- 305 residents
- 3.8 km²
- 80 people/km²
- 577 m
Key points
Among the 300 municipalities in Vaud, Trey ranks No. 254 by population.
A 1 kWp solar panel tilted at 38° generates about 1,251 kWh a year here.
Trey in numbers
Where is Trey?
Population of Trey over time
Trey had 256 residents in 2015 and 305 in 2025.
| Year | Population |
|---|---|
| 2020 | 302 |
| 2021 | 321 |
| 2022 | 300 |
| 2023 | 314 |
| 2024 | 318 |
| 2025 | 305 |
Did you know?
- “Entities listed in the commercial register”: lower than in 97% of municipalities.
- “Dwellings”: lower than in 95% of municipalities.
- “Jobs”: lower than in 92% of municipalities.
- Its area is roughly equal to 531 football pitches.
- Its population density is 2.9 times lower than the national average.
- The nearest more populous municipality is Villarzel (521 residents), 1.9 km away.
- A 4 kWp rooftop solar system here would generate about 5,004 kWh a year, roughly what an average household uses.
All indicators for Trey
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 | Trey | Vaud | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 15.7% | 17.1% | 20.7% |
Housing
| Indicator | Trey | Vaud | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 147 | 449,691 | 4,927,050 | ranked 1,997 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 68.7% | 25.9% | 23.3% | ||
| Dwellings in buildings built since 2001 (2026) | 11.6% | 24.7% | 25.3% | ||
| Share of single-family houses among residential buildings (2026) | 72.2% | 52.6% | 69.5% |
Energy
| Indicator | Trey | Vaud | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 75.6% | 72.6% | 53.5% | ||
| Heat pumps as main heating (2026) | 6.4% | 6.9% | 13.7% | ||
| Wood heating systems (2026) | 15.4% | 5.6% | 12.4% | ||
| District heating (2026) | 1.3% | 5.5% | 1.4% | ||
| Photovoltaic installations (2026) | 33 | 36,655 | 329,600 | ranked 1,782 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 2,882 kW | 784.6 kW | 1,134 kW | ||
| Rooftop solar electricity potential (2026) | 8.5 GWh/year | 6,033 GWh/year | 64,783 GWh/year | ranked 1,659 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 27,803 kWh/inh. | 6,985 kWh/inh. | 9,356 kWh/inh. |
Economy
| Indicator | Trey | Vaud | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 28 | 67,877 | 728,011 | ranked 1,940 of 2,112 | |
| Entities listed in the commercial register (2026) | 10 | 67,255 | 762,757 | ranked 2,035 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 32.8 | 77.9 | 64.9 | ||
| Share of limited companies (AG, GmbH) among registered entities (2026) | 50.0% | 67.6% | 65.7% | ||
| Share of sole proprietorships among registered entities (2026) | 40.0% | 26.9% | 29.0% |
Employment
| Indicator | Trey | Vaud | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 83 | 498,823 | 5,679,518 | ranked 1,938 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 272.1 | 577.7 | 362.9 | ||
| Share of jobs in services (2024) | 20.5% | 79.0% | 63.6% | ||
| Share of jobs in industry and construction (2024) | 9.6% | 16.3% | 24.2% |
Society
| Indicator | Trey | Vaud | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 14.8% | 34.3% | 18.9% |
Sunshine and temperatures: Trey
Frequently asked questions
What is the population of Trey?
Trey has 305 residents (2025), ranking 1,963 of 2,115 municipalities.
How big is Trey?
Trey covers 3.8 km², with a density of 80 people per km².
Is the population of Trey growing?
Between 2015 and 2025, the population of Trey went from 256 to 305, a change of +19.1%.
Where is Trey?
Trey is in Vaud. It belongs to District de la Broye-Vully (district). Latitude 46.767, longitude 6.917.
Entities listed in the commercial register: what is the figure for Trey?
In Trey, “Entities listed in the commercial register” stands at 10 (2026), ranking 2,035 of 2,115 municipalities; the national median is 118.
Dwellings: what is the figure for Trey?
In Trey, “Dwellings” stands at 147 (2026), ranking 1,997 of 2,108 municipalities; the national median is 990.
How much electricity does a solar panel produce in Trey?
In Trey, a 1 kWp south-facing system tilted at 38° produces about 1,251 kWh a year.
Which municipalities border Trey?
The nearest to Trey are Villarzel (1.9 km), Châtonnaye (2.2 km), Valbroye (2.3 km), Henniez (3.1 km), Ménières (3.2 km).