Demographics
BFS · 2025Women
1'425 50.4%
Men
1'400 49.6%
Children & youth (0–19)
613 21.7%
Swiss citizens
2'078 73.6%
Foreign residents
747 26.4%
Population density
485 pop./km²
0–19 · 613 · 21.7%20–64 · 1'600 · 56.6%65+ · 612 · 21.7%
Foreign residents 26.4%0%64.0%
Population change 2025: +36 (+1.3%) · 27 births · 25 deaths · net migration +28
STATPOP 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026 · swisstopo, retrieved 24.09.2026 · BEVNAT (Statistik der natürlichen Bevölkerungsbewegung) 2025 · Federal Statistical Office (FSO), retrieved 24.09.2026
27.09.2026Popular Initiative 'For food security – through increased sustainable domestic production, more plant-based food and clean drinking water (Food Initiative)'Federal● Rejected · 27.5% YesDistrict Bezirk Olten: 27.9% Yes
19.9% YesNo 80.1%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Olten: 25.3% Yes
28.3% YesNo 71.7%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Olten: 53.2% Yes
63.1% YesNo 36.9%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Olten: 46.7% Yes
55.4% YesNo 44.6%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% YesDistrict Bezirk Olten: 62.8% Yes
55.6% YesNo 44.4%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% YesDistrict Bezirk Olten: 62.8% Yes
55.9% YesNo 44.1%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Olten: 56.6% Yes
49.8% YesNo 50.2%
08.03.2026Popular Initiative ‘For a fair energy and climate policy: Investing for prosperity, jobs and the environment (Climate Fund Initiative)’Federal● Rejected · 29.3% YesDistrict Bezirk Olten: 28.5% Yes
18.8% YesNo 81.2%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Olten: 36.7% Yes
43.3% YesNo 56.7%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Olten: 35.8% Yes
41.4% YesNo 58.6%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP35.2% · strongest party
SVP35.2%
Mitte19.5%
FDP17.5%
SP13.1%
GRÜNE6.4%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier118%
Cantonal tax multiplier104%
118%SO range 65%145%
Tax rank 42 of 104 in canton SolothurnTax burden
Single, 100'000 CHF gross income
16'563 CHF(16.6%)
Rank 41 of 104 in the canton · 1641 of 2110 in Switzerland
Median canton 16'810 CHF · median Switzerland 15'290 CHF
Cheapest Kammersrohr 13'027 CHF · most expensive Bolken 18'375 CHF
100'000 CHF:16'563 CHF(~16.6%)
GretzenbachCanton range SolothurnSwitzerland median
Show data table
| Gross income | Gretzenbach | Solothurn | Switzerland median |
|---|---|---|---|
| 40'000 | 7.9% | 6.1–8.8% | 5.4% |
| 50'000 | 10.2% | 7.9–11.4% | 7.8% |
| 60'000 | 12.1% | 9.4–13.5% | 10.5% |
| 70'000 | 13.5% | 10.5–15.1% | 11.9% |
| 80'000 | 14.7% | 11.5–16.3% | 13.1% |
| 90'000 | 15.6% | 12.2–17.3% | 14.1% |
| 100'000 | 16.6% | 13–18.4% | 15.3% |
| 110'000 | 17.4% | 13.8–19.3% | 16.3% |
| 120'000 | 18.2% | 14.4–20.1% | 17.2% |
| 130'000 | 18.9% | 15.1–20.9% | 18.1% |
| 140'000 | 19.7% | 15.7–21.8% | 19% |
| 150'000 | 20.4% | 16.4–22.5% | 19.7% |
| 175'000 | 22.1% | 17.8–24.3% | 21.6% |
| 200'000 | 23.5% | 19.1–25.8% | 23.2% |
| 225'000 | 24.7% | 20.1–27% | 24.6% |
| 250'000 | 25.8% | 21.1–28.2% | 25.8% |
| 275'000 | 26.6% | 21.9–29.1% | 26.8% |
| 300'000 | 27.4% | 22.5–29.8% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–202010 °C
Precipitation 1991–20201'086 mm
10 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
516 m
Mean elevation
430 m
Relief
145 m
Mean slope
6.3°
Flat share
44.9%
South-facing
8.7%
Above 2000 m
0.0%
Relief 145 m0 m3'847 m
Terrain figures cover the whole municipal territory (swisstopo swissALTIRegio) — not the settlement point. Slope and south-facing share are resolution-dependent and measured at 40 m.
swissALTIRegio 2026 · swisstopo, retrieved 28.08.2026
Roof potential
29 GWh/yr
Roofs + façades
36.7 GWh/yr
≈ households powered
6'400
Per inhabitant
10'273 kWh/yr
29 GWh/yr01'133 GWh/yr
BFE solar factsheet ↗Modelled roof and façade potential from the BFE solar model — the electricity these surfaces could produce, not installed capacity or what the municipality actually generates today. The household figure divides the roof potential by 4'500 kWh per year, ElCom’s reference household (consumption profile H4, a 5-room apartment).
Swiss Federal Office of Energy (SFOE), retrieved 24.09.2026
Electricity
ElCom · 2027Tariff H4
25.59 Rp./kWh
Energy
13.45 Rp./kWh
Grid usage
7.77 Rp./kWh
Levies + grid surcharge
3.3 Rp./kWh
25.59 Rp./kWh10.5645.88
Canton median 28.51 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Elektra Gretzenbach AG
ElCom tariff comparison ↗How this is measured
Total household electricity price for ElCom consumption profile H4 — 4'500 kWh a year, a 5-room flat with electric stove and tumble dryer — standard product, excluding VAT, for the tariff year shown. Energy, grid usage, levies to public bodies and the federal grid surcharge are included. Canton and Swiss medians are ElCom's own published figures.
2027 · Federal Electricity Commission (ElCom), retrieved 12.09.2026
Health-insurance premiums
BAG · 2024Standard model, deductible 300606 CHF/mo
Ø premium in canton Solothurn424 CHF/mo
Estimate Switzerland 2026465.3 CHF/mo
Premiums are set not per municipality but per canton and premium region. Shown is the average adult premium paid in canton Solothurn (2024, BAG) — it applies canton-wide, not to any single location.
2024 · Federal Office of Public Health (FOPH), retrieved 12.09.2026
Housing
BFS · AREVacancy rate
2.64 %
Second homes
8 %
Avg. rooms
4.4
Dwellings
1'288
Built before 194619.5%
Built since 200124.5%
2.64 %0 %12 %
Vacancy rate from the BFS vacant-dwelling count (2025); building age and room count from the Buildings and Dwellings Statistics (2024). The average room count treats the ‘6 rooms or more’ class as 6, so it is a slight lower bound. The vacancy rate is volatile for small municipalities.
Buildings and Dwellings Statistics 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026 · Vacant dwellings survey 2025 · Federal Statistical Office (FSO), retrieved 24.09.2026 · Dwelling inventory and second-home share 2026 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026
Economy
BFS · 2024Jobs
895
Workplaces
167
Services share
48.4 %
Jobs by sector: Primary 29 (3.2%) · Secondary 433 (48.4%) · Tertiary 433 (48.4%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
8
Organic share
0 %
Farmland
151 ha
Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026
Accessibility
ARE · NPVMNational Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026
Municipality
Wikidata · CC0Wikidata · continuously updated, retrieved 24.09.2026
Largest municipalities2'825 #32 SO · #762 CHGrowing municipalities1.3% #25 SO · #637 CHShrinking municipalities1.3% #80 SO · #1469 CHJobs per resident0.32 #46 SO · #1183 CHFamilies & children21.7% #10 SO · #608 CHAge structure21.7% #62 SO · #911 CHWomen share50.4% #35 SO · #682 CHForeign residents26.4% #23 SO · #475 CHPopulation density485/km² #32 SO · #520 CHTax burden16'563 #41 SO · #1641 CHTaxes118% #42 SOWarmest municipalities10 °C #11 SO · #503 CHSunniest municipalities40% #96 SO · #1879 CHRainiest municipalities1'086 mm #70 SO · #1178 CHVoter turnout52.9% #61 SO · #1483 CHAgainst Switzerland11.8% #48 SO · #1117 CHAligned with Switzerland88.2% #34 SO · #341 CHSVP strongholds35.2% #31 SO · #958 CHSP strongholds13.1% #56 SO · #1157 CHCentre strongholds19.5% #47 SO · #556 CHFDP strongholds17.5% #41 SO · #613 CHGLP strongholds3.9% #82 SO · #1425 CHGreen strongholds6.4% #58 SO · #1227 CHLargest by area5.8 km² #55 SO · #1421 CHHighest municipalities398 m #95 SO · #1903 CHSecond homes8% #78 SO · #1631 CHOrganic farming0% #93 SO · #1777 CHBest-connected municipalities60 min #37 SO · #774 CHRemotest municipalities60 min #67 SO · #1334 CHHighest peaks516 m #78 SO · #1823 CHHighest-lying municipalities430 m #92 SO · #1867 CHGreatest vertical range145 m #66 SO · #1612 CHSteepest municipalities6.3° #63 SO · #1349 CHSolar potential29 GWh #29 SO · #703 CHSolar potential per capita10'273 kWh #38 SO · #1023 CHCheapest electricity25.59 Rp./kWh #25 SO · #716 CHMost expensive electricity25.59 Rp./kWh #82 SO · #1579 CH
Postal codes (2)
swisstopoLocalities
swisstopo · 2Nearby municipalities
swisstopo- What is the postal code of Gretzenbach?
- Gretzenbach has 2 postal codes: 4658, 5014.
- What is the tax rate in Gretzenbach?
- The municipal tax multiplier of Gretzenbach is 118% (2026); canton SO levies 104%.
- How much tax do you pay in Gretzenbach?
- A single person without children pays about 16'563 CHF income tax in Gretzenbach on 100'000 CHF gross income (federal, cantonal, municipal), rank 41 of 104 in canton SO. Source: ESTV (2026).
- How many residents does Gretzenbach have?
- Gretzenbach has 2'825 residents (2025).
- How many foreign residents live in Gretzenbach?
- Gretzenbach has 747 foreign residents, a share of 26.44% (2025).
Map
OpenStreetMapGretzenbach compared with
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