Diepoldsau: population and statistics
Diepoldsau has a population of 6,933 (2025) across 11.2 km², or 617 people per km². It ranks 285 of 2,115 municipalities by population. Its population is growing: +9.2% between 2015 and 2025.
- 6,933 residents
- 11.2 km²
- 617 people/km²
- 409 m
Key points
Among the 75 municipalities in St. Gallen, Diepoldsau ranks No. 24 by population.
A 1 kWp solar panel tilted at 39° generates about 1,178 kWh a year here.
Diepoldsau in numbers
Where is Diepoldsau?
Population of Diepoldsau over time
Diepoldsau had 6,347 residents in 2015 and 6,933 in 2025.
| Year | Population |
|---|---|
| 2020 | 6,479 |
| 2021 | 6,731 |
| 2022 | 6,889 |
| 2023 | 6,928 |
| 2024 | 6,939 |
| 2025 | 6,933 |
Did you know?
- “Photovoltaic installations”: higher than in 96% of municipalities.
- “Entities listed in the commercial register”: higher than in 90% of municipalities.
- Its area is roughly equal to 1,573 football pitches.
- Its population density is 2.7 times the national average.
- The nearest more populous municipality is Widnau (10,485 residents), 2.2 km away.
- A 4 kWp rooftop solar system here would generate about 4,712 kWh a year, roughly what an average household uses.
All indicators for Diepoldsau
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 | Diepoldsau | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of people aged 65 and over (2025) | 18.7% | 19.9% | 20.7% | ranked 1,274 of 1,811 |
Housing
| Indicator | Diepoldsau | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Dwellings (2026) | 3,099 | 280,853 | 4,927,050 | ranked 352 of 2,108 | |
| Dwellings in buildings built before 1946 (2026) | 14.2% | 23.5% | 23.3% | ranked 1,397 of 1,806 | |
| Dwellings in buildings built since 2001 (2026) | 38.3% | 24.8% | 25.3% | ranked 210 of 1,806 | |
| Share of single-family houses among residential buildings (2026) | 80.4% | 64.1% | 69.5% | ranked 207 of 1,806 |
Energy
| Indicator | Diepoldsau | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Oil or gas heating systems (2026) | 57.2% | 52.2% | 53.5% | ranked 787 of 1,806 | |
| Heat pumps as main heating (2026) | 28.9% | 30.7% | 13.7% | ranked 271 of 1,806 | |
| Wood heating systems (2026) | 5.9% | 9.0% | 12.4% | ranked 1,366 of 1,806 | |
| District heating (2026) | 5.9% | 6.0% | 1.4% | ranked 405 of 1,806 | |
| Photovoltaic installations (2026) | 489 | 26,111 | 329,600 | ranked 86 of 2,108 | |
| Installed photovoltaic capacity per 1,000 inhabitants (2026) | 1,668 kW | 1,325 kW | 1,134 kW | ranked 388 of 1,806 | |
| Rooftop solar electricity potential (2026) | 63.0 GWh/year | 4,072 GWh/year | 64,783 GWh/year | ranked 216 of 2,114 | |
| Rooftop solar potential per inhabitant (2026) | 9,084 kWh/inh. | 7,485 kWh/inh. | 9,356 kWh/inh. | ranked 957 of 1,810 |
Economy
| Indicator | Diepoldsau | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Establishments (2024) | 500 | 39,699 | 728,011 | ranked 281 of 2,112 | |
| Entities listed in the commercial register (2026) | 664 | 42,658 | 762,757 | ranked 212 of 2,115 | |
| Entities in the commercial register per 1,000 inhabitants (2026) | 95.8 | 78.4 | 64.9 | ranked 228 of 1,811 | |
| Share of limited companies (AG, GmbH) among registered entities (2026) | 66.9% | 65.2% | 65.7% | ranked 794 of 1,808 | |
| Share of sole proprietorships among registered entities (2026) | 29.2% | 29.2% | 29.0% | ranked 879 of 1,808 |
Employment
| Indicator | Diepoldsau | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Jobs (2024) | 3,721 | 317,461 | 5,679,518 | ranked 262 of 2,111 | |
| Jobs per 1,000 inhabitants (2024) | 536.7 | 583.5 | 362.9 | ranked 421 of 1,810 | |
| Share of jobs in services (2024) | 50.4% | 64.9% | 63.6% | ranked 1,336 of 1,804 | |
| Share of jobs in industry and construction (2024) | 43.4% | 30.3% | 24.2% | ranked 221 of 1,776 |
Society
| Indicator | Diepoldsau | St. Gallen | National | Position? | Rank |
|---|---|---|---|---|---|
| Share of foreign nationals (2025) | 27.0% | 27.2% | 18.9% | ranked 431 of 1,811 |
Sunshine and temperatures: Diepoldsau
Frequently asked questions
What is the population of Diepoldsau?
Diepoldsau has 6,933 residents (2025), ranking 285 of 2,115 municipalities.
How big is Diepoldsau?
Diepoldsau covers 11.2 km², with a density of 617 people per km².
Is the population of Diepoldsau growing?
Between 2015 and 2025, the population of Diepoldsau went from 6,347 to 6,933, a change of +9.2%.
Where is Diepoldsau?
Diepoldsau is in St. Gallen. It belongs to Wahlkreis Rheintal (district). Latitude 47.383, longitude 9.650.
Photovoltaic installations: what is the figure for Diepoldsau?
In Diepoldsau, “Photovoltaic installations” stands at 489 (2026), ranking 86 of 2,108 municipalities; the national median is 103.
Entities listed in the commercial register: what is the figure for Diepoldsau?
In Diepoldsau, “Entities listed in the commercial register” stands at 664 (2026), ranking 212 of 2,115 municipalities; the national median is 118.
How much electricity does a solar panel produce in Diepoldsau?
In Diepoldsau, a 1 kWp south-facing system tilted at 39° produces about 1,178 kWh a year.
Which municipalities border Diepoldsau?
The nearest to Diepoldsau are Widnau (2.2 km), Balgach (4.2 km), Rebstein (5.3 km), Berneck (5.4 km), Au (SG) (5.7 km).