Koski Tl: population and statistics
Koski Tl has a population of 2,144 (2025) across 191.5 km², or 11.2 people per km². It ranks 248 of 308 municipalities by population. Its population is falling: −10.6% between 2015 and 2025.
- 2,144 residents
- 191.5 km²
- 11 people/km²
- 76 m
Koski Tl in numbers
Key points
Among the 27 municipalities in Southwest Finland, Koski Tl ranks No. 22 by population.
Business establishments per 1,000 inhabitants: 216.8 /1,000 inh. in Koski Tl, compared with an average of 110.1 /1,000 inh. in Southwest Finland and 106.4 /1,000 inh. nationally.
Largest business sector: Manufacturing, with 23.7% of the area's jobs.
A 1 kWp solar panel tilted at 44° generates about 922 kWh a year here.
Did you know?
- “Share of residential buildings heated with geothermal heat”: lower than in 99% of municipalities.
- “Business establishments per 1,000 inhabitants”: higher than in 97% of municipalities.
- “Share of dwellings built before 1940”: higher than in 96% of municipalities.
- Its area is roughly equal to 26,821 football pitches.
- The nearest municipality is Marttila, 15.2 km away.
- The nearest more populous municipality is Somero (8,339 residents), 21 km away.
- A 4 kWp rooftop solar system here would generate about 3,688 kWh a year, roughly what an average household uses.
Population of Koski Tl over time
Koski Tl had 2,399 residents in 2015 and 2,144 in 2025.
| Year | Population |
|---|---|
| 2020 | 2,292 |
| 2021 | 2,271 |
| 2022 | 2,227 |
| 2023 | 2,207 |
| 2024 | 2,186 |
| 2025 | 2,144 |
All indicators for Koski Tl
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 | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged under 15 (2025) | 12.2% | 13.6% | 13.3% | ranked 193 of 302 | |
| Share of people aged 65 and over (2025) | 34.8% | 24.4% | 31.2% | ranked 109 of 302 | |
| Mean age of the population (2025) | 50.8 years | 44.5 | 48.5 | ranked 96 of 302 | |
| Share of Swedish speakers (2025) | 0.5% | 5.5% | 0.3% | ranked 90 of 302 | |
| Share of foreign nationals (2025) | 3.3% | 7.9% | 3.4% | ranked 153 of 302 |
Housing
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Total dwellings (2025) | 1,340 no. | 290,562 no. | 3,258,449 no. | ranked 250 of 308 | |
| Share of dwellings built before 1940 (2025) | 20.2% | – | 8.2% | ranked 12 of 302 | |
| Share of dwellings built after 2000 (2025) | 11.4% | – | 14.5% | ranked 200 of 302 | |
| Share of dwellings in detached and semi-detached houses (2025) | 66.6% | – | 64.5% | ranked 128 of 302 | |
| Share of dwellings in blocks of flats (2025) | 5.9% | – | 11.1% | ranked 208 of 302 | |
| Share of dwellings not permanently occupied (2025) | 15.7% | – | 16.9% | ranked 177 of 302 | |
| Free-time residential buildings per 1,000 inhabitants (2025) | 91.0 /1,000 inh. | 96.5 /1,000 inh. | 186.3 /1,000 inh. | ranked 207 of 302 |
Energy
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of residential buildings heated with district heating (2025) | 7.0% | – | 3.9% | ranked 82 of 302 | |
| Share of residential buildings heated with electricity (2025) | 37.9% | – | 39.8% | ranked 185 of 302 | |
| Share of residential buildings heated with geothermal heat (2025) | 1.2% | – | 5.5% | ranked 297 of 302 | |
| Share of residential buildings heated with oil or gas (2025) | 18.5% | – | 17.1% | ranked 129 of 302 | |
| Share of residential buildings heated with wood or peat (2025) | 35.4% | – | 29.1% | ranked 94 of 302 |
Economy
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Business establishments (2024) | 474 no. | 54,602 no. | 600,547 no. | ranked 221 of 308 | |
| Business establishments per 1,000 inhabitants (2024) | 216.8 /1,000 inh. | 110.1 /1,000 inh. | 141.7 /1,000 inh. | ranked 10 of 302 | |
| Median disposable cash income per consumption unit (2024) | 29,226 €/year | – | 29,044 €/year | ranked 136 of 302 | |
| Price per m² of old dwellings in housing companies (2025) | 745 €/m² | – | 1,110 €/m² | ranked 177 of 220 | |
| Active companies in the business register (excluding sole traders) (2026) | 151 per 1,000 inh. | 30,470 per 1,000 inh. | 335,854 per 1,000 inh. | ranked 226 of 308 | |
| Active companies in the register per 1,000 inhabitants (excluding sole traders) (2026) | 70.4 per 1,000 inh. | 61.2 per 1,000 inh. | 53.9 per 1,000 inh. | ranked 44 of 302 | |
| Companies registered in the last 12 months per 1,000 inhabitants (2026) | 4.2 per 1,000 inh. | 4.0 per 1,000 inh. | 2.7 per 1,000 inh. | ranked 44 of 302 |
Employment
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Persons employed in the area (jobs) (2024) | 837 no. | 207,169 no. | 2,423,433 no. | ranked 221 of 308 | |
| Unemployed as a share of the labour force (2024) | 9.7% | 11.0% | 10.8% | ranked 181 of 302 | |
| Employment rate (aged 20–64) (2024) | 75.2% | 74.2% | 75.4% | ranked 155 of 302 |
Transport
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Passenger cars per 1,000 inhabitants (2025) | 612 /1,000 inh. | 495 /1,000 inh. | 580 /1,000 inh. | ranked 70 of 302 |
Society
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| At-risk-of-poverty rate (2024) | 14.8% | 14.8% | 14.3% | ranked 139 of 302 |
Education
| Indicator | Koski Tl | Southwest Finland | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 15 and over with a tertiary-level qualification (2024) | 22.1% | 33.5% | 24.1% | ranked 200 of 302 |
Business sectors: Koski Tl
Share of each sector in total jobs; “×1.5” means the sector is 1.5 times more common than nationally.
- Manufacturing23.7% ×1.9
- Agriculture, forestry and fishing13.9% ×5.7
- Transport and storage12.0% ×2.3
- Health and social work12.0% ×0.6
- Construction8.5% ×1.3
- Wholesale and retail trade7.2% ×0.7
- Education7.0% ×0.9
- Public administration and defence3.5% ×0.7
Sunshine and temperatures: Koski Tl
Where is Koski Tl?
Frequently asked questions
What is the population of Koski Tl?
Koski Tl has 2,144 residents (2025), ranking 248 of 308 municipalities.
How big is Koski Tl?
Koski Tl covers 191.5 km², with a density of 11 people per km².
Is the population of Koski Tl growing?
Between 2015 and 2025, the population of Koski Tl went from 2,399 to 2,144, a change of −10.6%.
Where is Koski Tl?
Koski Tl is in Southwest Finland. Latitude 60.654, longitude 23.140.
Share of residential buildings heated with geothermal heat: what is the figure for Koski Tl?
In Koski Tl, “Share of residential buildings heated with geothermal heat” stands at 1.2% (2025), ranking 297 of 302 municipalities; the national median is 5.5%.
Business establishments per 1,000 inhabitants: what is the figure for Koski Tl?
In Koski Tl, “Business establishments per 1,000 inhabitants” stands at 216.8 /1,000 inh. (2024), ranking 10 of 302 municipalities; the national median is 141.7 /1,000 inh..
How much electricity does a solar panel produce in Koski Tl?
In Koski Tl, a 1 kWp south-facing system tilted at 44° produces about 922 kWh a year.
Which municipalities border Koski Tl?
The nearest to Koski Tl are Marttila (15 km), Ypäjä (19 km), Somero (21 km), Loimaa (22 km), Jokioinen (25 km).
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