Lahti: population and statistics
Lahti has a population of 121,832 (2025) across 459.6 km², or 265 people per km². It ranks 9 of 308 municipalities by population. Its population is growing: +2.6% between 2015 and 2025.
- 121,832 residents
- 459.6 km²
- 265 people/km²
- 105 m
Lahti in numbers
Key points
Among the 10 municipalities in Päijät-Häme, Lahti ranks No. 1 by population.
Largest business sector: Health and social work, with 22.2% of the area's jobs.
A 1 kWp solar panel tilted at 43° generates about 879 kWh a year here.
Did you know?
- Number 1 in Päijät-Häme for “Population”.
- Number 1 in Päijät-Häme for “Population density”.
- “Share of dwellings in blocks of flats”: higher than in 99% of municipalities.
- “Share of residential buildings heated with district heating”: higher than in 99% of municipalities.
- “Active companies in the business register (excluding sole traders)”: higher than in 98% of municipalities.
- Its area is roughly equal to 64,367 football pitches.
- Its population density is 14.3 times the national average.
Population of Lahti over time
Lahti had 118,743 residents in 2015 and 121,832 in 2025.
| Year | Population |
|---|---|
| 2020 | 119,984 |
| 2021 | 120,027 |
| 2022 | 120,175 |
| 2023 | 120,693 |
| 2024 | 121,337 |
| 2025 | 121,832 |
All indicators for Lahti
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 | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged under 15 (2025) | 13.1% | 12.9% | 13.3% | ranked 158 of 302 | |
| Share of people aged 65 and over (2025) | 25.9% | 29.0% | 31.2% | ranked 229 of 302 | |
| Mean age of the population (2025) | 45.3 years | 47.2 | 48.5 | ranked 223 of 302 | |
| Share of Swedish speakers (2025) | 0.5% | 0.4% | 0.3% | ranked 90 of 302 | |
| Share of foreign nationals (2025) | 7.3% | 5.6% | 3.4% | ranked 34 of 302 |
Housing
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Total dwellings (2025) | 74,568 no. | 124,266 no. | 3,258,449 no. | ranked 8 of 308 | |
| Share of dwellings built before 1940 (2025) | 3.3% | – | 8.2% | ranked 245 of 302 | |
| Share of dwellings built after 2000 (2025) | 22.9% | – | 14.5% | ranked 78 of 302 | |
| Share of dwellings in detached and semi-detached houses (2025) | 22.3% | – | 64.5% | ranked 296 of 302 | |
| Share of dwellings in blocks of flats (2025) | 67.4% | – | 11.1% | ranked 5 of 302 | |
| Share of dwellings not permanently occupied (2025) | 10.4% | – | 16.9% | ranked 253 of 302 | |
| Free-time residential buildings per 1,000 inhabitants (2025) | 14.1 /1,000 inh. | 110.6 /1,000 inh. | 186.3 /1,000 inh. | ranked 280 of 302 |
Energy
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of residential buildings heated with district heating (2025) | 38.4% | – | 3.9% | ranked 3 of 302 | |
| Share of residential buildings heated with electricity (2025) | 35.9% | – | 39.8% | ranked 219 of 302 | |
| Share of residential buildings heated with geothermal heat (2025) | 4.7% | – | 5.5% | ranked 177 of 302 | |
| Share of residential buildings heated with oil or gas (2025) | 12.6% | – | 17.1% | ranked 231 of 302 | |
| Share of residential buildings heated with wood or peat (2025) | 8.3% | – | 29.1% | ranked 276 of 302 |
Economy
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Business establishments (2024) | 10,187 no. | 20,245 no. | 600,547 no. | ranked 9 of 308 | |
| Business establishments per 1,000 inhabitants (2024) | 84.0 /1,000 inh. | 98.8 /1,000 inh. | 141.7 /1,000 inh. | ranked 289 of 302 | |
| Median disposable cash income per consumption unit (2024) | 28,461 €/year | – | 29,044 €/year | ranked 188 of 302 | |
| Price per m² of old dwellings in housing companies (2025) | 1,675 €/m² | – | 1,110 €/m² | ranked 50 of 220 | |
| Active companies in the business register (excluding sole traders) (2026) | 6,041 per 1,000 inh. | 10,533 per 1,000 inh. | 335,854 per 1,000 inh. | ranked 8 of 308 | |
| Active companies in the register per 1,000 inhabitants (excluding sole traders) (2026) | 49.6 per 1,000 inh. | 51.5 per 1,000 inh. | 53.9 per 1,000 inh. | ranked 195 of 302 | |
| Companies registered in the last 12 months per 1,000 inhabitants (2026) | 3.5 per 1,000 inh. | 3.3 per 1,000 inh. | 2.7 per 1,000 inh. | ranked 72 of 302 |
Employment
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Persons employed in the area (jobs) (2024) | 51,413 no. | 75,266 no. | 2,423,433 no. | ranked 9 of 308 | |
| Unemployed as a share of the labour force (2024) | 15.8% | 14.6% | 10.8% | ranked 22 of 302 | |
| Employment rate (aged 20–64) (2024) | 69.4% | 71.2% | 75.4% | ranked 265 of 302 |
Tourism
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Beds in accommodation establishments per 1,000 inhabitants (2025) | 14.8 /1,000 inh. | 33.1 /1,000 inh. | 36.4 /1,000 inh. | ranked 111 of 136 |
Transport
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Passenger cars per 1,000 inhabitants (2025) | 447 /1,000 inh. | 494 /1,000 inh. | 580 /1,000 inh. | ranked 292 of 302 |
Society
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| At-risk-of-poverty rate (2024) | 17.6% | 16.1% | 14.3% | ranked 48 of 302 |
Education
| Indicator | Lahti | Päijät-Häme | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 15 and over with a tertiary-level qualification (2024) | 30.8% | 29.0% | 24.1% | ranked 59 of 302 |
Business sectors: Lahti
Share of each sector in total jobs; “×1.5” means the sector is 1.5 times more common than nationally.
- Health and social work22.2% ×1.2
- Manufacturing14.8% ×1.2
- Wholesale and retail trade12.0% ×1.1
- Administrative and support services7.8% ×1.1
- Construction7.2% ×1.1
- Education7.1% ×1.0
- Professional, scientific and technical5.4% ×0.9
- Transport and storage5.0% ×1.0
Sunshine and temperatures: Lahti
Where is Lahti?
Frequently asked questions
What is the population of Lahti?
Lahti has 121,832 residents (2025), ranking 9 of 308 municipalities.
How big is Lahti?
Lahti covers 459.6 km², with a density of 265 people per km².
Is the population of Lahti growing?
Between 2015 and 2025, the population of Lahti went from 118,743 to 121,832, a change of +2.6%.
Where is Lahti?
Lahti is in Päijät-Häme. Latitude 60.980, longitude 25.655.
Share of dwellings in blocks of flats: what is the figure for Lahti?
In Lahti, “Share of dwellings in blocks of flats” stands at 67.4% (2025), ranking 5 of 302 municipalities; the national median is 11.1%.
Share of residential buildings heated with district heating: what is the figure for Lahti?
In Lahti, “Share of residential buildings heated with district heating” stands at 38.4% (2025), ranking 3 of 302 municipalities; the national median is 3.9%.
How much electricity does a solar panel produce in Lahti?
In Lahti, a 1 kWp south-facing system tilted at 43° produces about 879 kWh a year.
Which municipalities border Lahti?
The nearest to Lahti are Hollola (7.7 km), Orimattila (20 km), Asikkala (22 km), Kärkölä (24 km), Heinola (32 km).
Coat of arms: Public domain, Wikimedia Commons. Coats of arms and flags are shown for identification only; this site is not affiliated with any public authority.
