Illnau-Effretikon: population and statistics
Illnau-Effretikon has a population of 17,973 (2025) across 32.9 km², or 546 people per km². It ranks 71 of 2,115 municipalities by population. Its population is growing: +7.4% between 2015 and 2025.
- 17,973 residents
- 32.9 km²
- 546 people/km²
- 512 m
Key points
Among the 160 municipalities in Zürich, Illnau-Effretikon ranks No. 17 by population.
A 1 kWp solar panel tilted at 37° generates about 1,155 kWh a year here.
Illnau-Effretikon in numbers
Where is Illnau-Effretikon?
Population of Illnau-Effretikon over time
Illnau-Effretikon had 16,734 residents in 2015 and 17,973 in 2025.
| Year | Population |
|---|---|
| 2020 | 17,352 |
| 2021 | 17,395 |
| 2022 | 17,564 |
| 2023 | 17,679 |
| 2024 | 17,756 |
| 2025 | 17,973 |
Did you know?
- “Dwellings”: higher than in 96% of municipalities.
- “Rooftop solar electricity potential”: higher than in 96% of municipalities.
- “Establishments”: higher than in 95% of municipalities.
- Its area is roughly equal to 4,609 football pitches.
- Its population density is 2.3 times the national average.
- The nearest municipality is Volketswil, 3.4 km away.
- The nearest more populous municipality is Uster (37,031 residents), 7.4 km away.
All indicators for Illnau-Effretikon
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 | Illnau-Effretikon | Zürich | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 19.8% | 17.6% | 20.7% | ranked 1,083 of 1,811 |
Housing
| Indicator | Illnau-Effretikon | Zürich | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 8,888 | 810,666 | 4,927,050 | ranked 77 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 13.6% | 20.9% | 23.3% | ranked 1,432 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 20.4% | 27.3% | 25.3% | ranked 1,218 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 63.8% | 50.5% | 69.5% | ranked 1,205 of 1,806 |
Energy
| Indicator | Illnau-Effretikon | Zürich | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 52.7% | 63.4% | 53.5% | ranked 937 of 1,806 | |
| Heat pumps as main heating (2026) | 34.2% | 20.2% | 13.7% | ranked 165 of 1,806 | |
| Wood heating systems (2026) | 9.2% | 5.4% | 12.4% | ranked 1,122 of 1,806 | |
| District heating (2026) | 1.6% | 8.1% | 1.4% | ranked 854 of 1,806 | |
| Photovoltaic installations (2026) | 412 | 33,320 | 329,600 | ranked 140 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 771.0 kW | 571.3 kW | 1,134 kW | ranked 1,394 of 1,806 | |
| Rooftop solar electricity potential (2026) | 94.8 GWh/year | 7,291 GWh/year | 64,783 GWh/year | ranked 93 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 5,277 kWh/inh. | 4,465 kWh/inh. | 9,356 kWh/inh. | ranked 1,645 of 1,810 |
Economy
| Indicator | Illnau-Effretikon | Zürich | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 1,091 | 126,784 | 728,011 | ranked 100 of 2,112 | |
| Entities listed in the commercial register (2026) | 1,096 | 132,519 | 762,757 | ranked 117 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 61.0 | 81.2 | 64.9 | ranked 1,069 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 65.3% | 67.3% | 65.7% | ranked 941 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 31.0% | 27.9% | 29.0% | ranked 726 of 1,808 |
Employment
| Indicator | Illnau-Effretikon | Zürich | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 7,032 | 1,149,866 | 5,679,518 | ranked 134 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 391.3 | 704.2 | 362.9 | ranked 801 of 1,810 | |
| Share of jobs in services (2024) | 70.3% | 81.6% | 63.6% | ranked 646 of 1,804 | |
| Share of jobs in industry and construction (2024) | 26.6% | 16.2% | 24.2% | ranked 782 of 1,776 |
Society
| Indicator | Illnau-Effretikon | Zürich | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 29.7% | 29.2% | 18.9% | ranked 311 of 1,811 |
Sunshine and temperatures: Illnau-Effretikon
Frequently asked questions
What is the population of Illnau-Effretikon?
Illnau-Effretikon has 17,973 residents (2025), ranking 71 of 2,115 municipalities.
How big is Illnau-Effretikon?
Illnau-Effretikon covers 32.9 km², with a density of 546 people per km².
Is the population of Illnau-Effretikon growing?
Between 2015 and 2025, the population of Illnau-Effretikon went from 16,734 to 17,973, a change of +7.4%.
Where is Illnau-Effretikon?
Illnau-Effretikon is in Zürich. It belongs to Bezirk Pfäffikon (district). Latitude 47.416, longitude 8.720.
Dwellings: what is the figure for Illnau-Effretikon?
In Illnau-Effretikon, “Dwellings” stands at 8,888 (2026), ranking 77 of 2,108 municipalities; the national median is 990.
Rooftop solar electricity potential: what is the figure for Illnau-Effretikon?
In Illnau-Effretikon, “Rooftop solar electricity potential” stands at 94.8 GWh/year (2026), ranking 93 of 2,114 municipalities; the national median is 19.0 GWh/year.
How much electricity does a solar panel produce in Illnau-Effretikon?
In Illnau-Effretikon, a 1 kWp south-facing system tilted at 37° produces about 1,155 kWh a year.
Which municipalities border Illnau-Effretikon?
The nearest to Illnau-Effretikon are Volketswil (3.4 km), Weisslingen (3.8 km), Fehraltorf (4.2 km), Lindau (4.7 km), Russikon (4.9 km).