Illgau: population and statistics
Illgau has a population of 819 (2025) across 10.9 km², or 75.1 people per km². It ranks 1,577 of 2,115 municipalities by population. Its population is growing: +3.4% between 2015 and 2025.
- 819 residents
- 10.9 km²
- 75 people/km²
- 820 m
Key points
Among the 30 municipalities in Schwyz, Illgau ranks No. 27 by population.
District heating: 0.0% in Illgau, compared with an average of 8.9% in Schwyz and 7.3% nationally.
Share of single-family houses among residential buildings: 28.5% in Illgau, compared with an average of 53.5% in Schwyz and 56.9% nationally.
A 1 kWp solar panel tilted at 36° generates about 1,037 kWh a year here.
Illgau in numbers
Where is Illgau?
Population of Illgau over time
Illgau had 792 residents in 2015 and 819 in 2025.
| Year | Population |
|---|---|
| 2020 | 795 |
| 2021 | 795 |
| 2022 | 815 |
| 2023 | 821 |
| 2024 | 822 |
| 2025 | 819 |
Did you know?
- “District heating”: lower than in 99% of municipalities.
- “Share of single-family houses among residential buildings”: lower than in 99% of municipalities.
- “Share of foreign nationals”: lower than in 98% of municipalities.
- Its area is roughly equal to 1,527 football pitches.
- Its population density is 3.1 times lower than the national average.
- The nearest more populous municipality is Muotathal (3,604 residents), 2.9 km away.
- A 4 kWp rooftop solar system here would generate about 4,148 kWh a year, roughly what an average household uses.
All indicators for Illgau
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 | Illgau | Schwyz | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 16.6% | 20.4% | 20.7% | ranked 1,568 of 1,811 |
Housing
| Indicator | Illgau | Schwyz | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 392 | 85,978 | 4,927,050 | ranked 1,648 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 13.0% | 14.2% | 23.3% | ranked 1,460 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 38.5% | 33.5% | 25.3% | ranked 205 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 28.5% | 53.5% | 69.5% | ranked 1,788 of 1,806 |
Energy
| Indicator | Illgau | Schwyz | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 20.6% | 55.5% | 53.5% | ranked 1,752 of 1,806 | |
| Heat pumps as main heating (2026) | 16.4% | 12.1% | 13.7% | ranked 749 of 1,806 | |
| Wood heating systems (2026) | 57.5% | 15.4% | 12.4% | ranked 33 of 1,806 | |
| District heating (2026) | 0.0% | 8.9% | 1.4% | ranked 1,506 of 1,806 | |
| Photovoltaic installations (2026) | 23 | 5,032 | 329,600 | ranked 1,908 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 407.9 kW | 900.4 kW | 1,134 kW | ranked 1,727 of 1,806 | |
| Rooftop solar electricity potential (2026) | 6.4 GWh/year | 1,061 GWh/year | 64,783 GWh/year | ranked 1,810 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 7,839 kWh/inh. | 6,237 kWh/inh. | 9,356 kWh/inh. | ranked 1,208 of 1,810 |
Economy
| Indicator | Illgau | Schwyz | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 54 | 16,724 | 728,011 | ranked 1,662 of 2,112 | |
| Entities listed in the commercial register (2026) | 32 | 22,716 | 762,757 | ranked 1,778 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 39.1 | 133.6 | 64.9 | ranked 1,762 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 62.5% | 77.3% | 65.7% | ranked 1,190 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 34.4% | 19.0% | 29.0% | ranked 444 of 1,808 |
Employment
| Indicator | Illgau | Schwyz | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 176 | 92,873 | 5,679,518 | ranked 1,679 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 214.9 | 546.1 | 362.9 | ranked 1,509 of 1,810 | |
| Share of jobs in services (2024) | 46.0% | 68.3% | 63.6% | ranked 1,456 of 1,804 | |
| Share of jobs in industry and construction (2024) | 19.3% | 25.6% | 24.2% | ranked 1,135 of 1,776 |
Society
| Indicator | Illgau | Schwyz | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 4.5% | 24.3% | 18.9% | ranked 1,773 of 1,811 |
Sunshine and temperatures: Illgau
Frequently asked questions
What is the population of Illgau?
Illgau has 819 residents (2025), ranking 1,577 of 2,115 municipalities.
How big is Illgau?
Illgau covers 10.9 km², with a density of 75 people per km².
Is the population of Illgau growing?
Between 2015 and 2025, the population of Illgau went from 792 to 819, a change of +3.4%.
Where is Illgau?
Illgau is in Schwyz. It belongs to Bezirk Schwyz (district). Latitude 46.987, longitude 8.725.
District heating: what is the figure for Illgau?
In Illgau, “District heating” stands at 0.0% (2026), ranking 1,506 of 1,806 municipalities; the national median is 1.4%.
Share of single-family houses among residential buildings: what is the figure for Illgau?
In Illgau, “Share of single-family houses among residential buildings” stands at 28.5% (2026), ranking 1,788 of 1,806 municipalities; the national median is 69.5%.
How much electricity does a solar panel produce in Illgau?
In Illgau, a 1 kWp south-facing system tilted at 36° produces about 1,037 kWh a year.
Which municipalities border Illgau?
The nearest to Illgau are Muotathal (2.9 km), Schwyz (6.2 km), Riemenstalden (6.4 km), Oberiberg (7.2 km), Morschach (8.0 km).