Untereggen: population and statistics
Untereggen has a population of 1,035 (2025) across 7.1 km², or 145 people per km². It ranks 1,441 of 2,115 municipalities by population. Its population is falling: −1.0% between 2015 and 2025.
- 1,035 residents
- 7.1 km²
- 145 people/km²
- 510 m
Key points
Among the 75 municipalities in St. Gallen, Untereggen ranks No. 74 by population.
Heat pumps as main heating: 44.7% in Untereggen, compared with an average of 30.7% in St. Gallen and 15.5% nationally.
Share of single-family houses among residential buildings: 83.6% in Untereggen, compared with an average of 64.1% in St. Gallen and 56.9% nationally.
A 1 kWp solar panel tilted at 36° generates about 1,104 kWh a year here.
Untereggen in numbers
Where is Untereggen?
Population of Untereggen over time
Untereggen had 1,045 residents in 2015 and 1,035 in 2025.
| Year | Population |
|---|---|
| 2020 | 1,034 |
| 2021 | 1,032 |
| 2022 | 1,026 |
| 2023 | 1,027 |
| 2024 | 1,035 |
| 2025 | 1,035 |
Did you know?
- “Heat pumps as main heating”: higher than in 98% of municipalities.
- “Share of single-family houses among residential buildings”: higher than in 95% of municipalities.
- Its area is roughly equal to 1,000 football pitches.
- The nearest more populous municipality is Mörschwil (3,702 residents), 1.8 km away.
- A 4 kWp rooftop solar system here would generate about 4,416 kWh a year, roughly what an average household uses.
All indicators for Untereggen
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 | Untereggen | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 17.2% | 19.9% | 20.7% | ranked 1,490 of 1,811 |
Housing
| Indicator | Untereggen | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 466 | 280,853 | 4,927,050 | ranked 1,560 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 31.3% | 23.5% | 23.3% | ranked 543 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 29.6% | 24.8% | 25.3% | ranked 627 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 83.6% | 64.1% | 69.5% | ranked 89 of 1,806 |
Energy
| Indicator | Untereggen | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 35.3% | 52.2% | 53.5% | ranked 1,510 of 1,806 | |
| Heat pumps as main heating (2026) | 44.7% | 30.7% | 13.7% | ranked 37 of 1,806 | |
| Wood heating systems (2026) | 17.3% | 9.0% | 12.4% | ranked 662 of 1,806 | |
| District heating (2026) | 1.8% | 6.0% | 1.4% | ranked 813 of 1,806 | |
| Photovoltaic installations (2026) | 88 | 26,111 | 329,600 | ranked 1,184 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,226 kW | 1,325 kW | 1,134 kW | ranked 799 of 1,806 | |
| Rooftop solar electricity potential (2026) | 8.9 GWh/year | 4,072 GWh/year | 64,783 GWh/year | ranked 1,631 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 8,570 kWh/inh. | 7,485 kWh/inh. | 9,356 kWh/inh. | ranked 1,060 of 1,810 |
Economy
| Indicator | Untereggen | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 101 | 39,699 | 728,011 | ranked 1,251 of 2,112 | |
| Entities listed in the commercial register (2026) | 72 | 42,658 | 762,757 | ranked 1,373 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 69.6 | 78.4 | 64.9 | ranked 725 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 59.7% | 65.2% | 65.7% | ranked 1,395 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 37.5% | 29.2% | 29.0% | ranked 255 of 1,808 |
Employment
| Indicator | Untereggen | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 286 | 317,461 | 5,679,518 | ranked 1,445 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 276.3 | 583.5 | 362.9 | ranked 1,261 of 1,810 | |
| Share of jobs in services (2024) | 50.0% | 64.9% | 63.6% | ranked 1,350 of 1,804 | |
| Share of jobs in industry and construction (2024) | 28.7% | 30.3% | 24.2% | ranked 681 of 1,776 |
Society
| Indicator | Untereggen | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 11.1% | 27.2% | 18.9% | ranked 1,466 of 1,811 |
Sunshine and temperatures: Untereggen
Frequently asked questions
What is the population of Untereggen?
Untereggen has 1,035 residents (2025), ranking 1,441 of 2,115 municipalities.
How big is Untereggen?
Untereggen covers 7.1 km², with a density of 145 people per km².
Is the population of Untereggen growing?
Between 2015 and 2025, the population of Untereggen went from 1,045 to 1,035, a change of −1.0%.
Where is Untereggen?
Untereggen is in St. Gallen. It belongs to Wahlkreis Rorschach (district). Latitude 47.466, longitude 9.450.
Heat pumps as main heating: what is the figure for Untereggen?
In Untereggen, “Heat pumps as main heating” stands at 44.7% (2026), ranking 37 of 1,806 municipalities; the national median is 13.7%.
Share of single-family houses among residential buildings: what is the figure for Untereggen?
In Untereggen, “Share of single-family houses among residential buildings” stands at 83.6% (2026), ranking 89 of 1,806 municipalities; the national median is 69.5%.
How much electricity does a solar panel produce in Untereggen?
In Untereggen, a 1 kWp south-facing system tilted at 36° produces about 1,104 kWh a year.
Which municipalities border Untereggen?
The nearest to Untereggen are Mörschwil (1.8 km), Tübach (1.9 km), Goldach (2.2 km), Eggersriet (2.2 km), Horn (3.4 km).