Demographics
BFS · 2025Women
553 50.8%
Men
535 49.2%
Children & youth (0–19)
197 18.1%
Swiss citizens
956 87.9%
Foreign residents
132 12.1%
Population density
67 pop./km²
0–19 · 197 · 18.1%20–64 · 631 · 58.0%65+ · 260 · 23.9%
Foreign residents 12.1%0%64.0%
Population change 2025: +0 (+0%) · 11 births · 13 deaths · net migration −1
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 Dorneck: 29.8% Yes
19.1% YesNo 80.9%
27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Dorneck: 29.4% Yes
42.9% YesNo 57.1%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Dorneck: 51.2% Yes
58.1% YesNo 41.9%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Dorneck: 45.4% Yes
61.4% YesNo 38.6%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung des KantonsratsgesetzesCantonal SO● Accepted · 58.6% YesDistrict Bezirk Dorneck: 62.8% Yes
56.9% YesNo 43.1%
14.06.2026Stellvertretung im Kantonsrat bei Mutterschaft: Änderung der KantonsverfassungCantonal SO● Accepted · 58.7% YesDistrict Bezirk Dorneck: 62.7% Yes
56.8% YesNo 43.2%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Bezirk Dorneck: 52.7% Yes
47.1% YesNo 52.9%
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 Dorneck: 28.1% Yes
18.3% YesNo 81.7%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Bezirk Dorneck: 37.0% Yes
44.1% YesNo 55.9%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Bezirk Dorneck: 38.5% Yes
49.7% YesNo 50.3%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026
Politics
National Council election 2023SVP34.4% · strongest party
SVP34.4%
Mitte26.3%
FDP13.7%
SP8.3%
GRÜNE6.5%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier125%
Cantonal tax multiplier104%
125%SO range 65%145%
Tax rank 65 of 104 in canton SolothurnTax burden
Single, 100'000 CHF gross income
17'010 CHF(17%)
Rank 64 of 104 in the canton · 1830 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:17'010 CHF(~17%)
SeewenCanton range SolothurnSwitzerland median
Show data table
| Gross income | Seewen | Solothurn | Switzerland median |
|---|---|---|---|
| 40'000 | 8% | 6.1–8.8% | 5.4% |
| 50'000 | 10.4% | 7.9–11.4% | 7.8% |
| 60'000 | 12.4% | 9.4–13.5% | 10.5% |
| 70'000 | 13.9% | 10.5–15.1% | 11.9% |
| 80'000 | 15.1% | 11.5–16.3% | 13.1% |
| 90'000 | 16% | 12.2–17.3% | 14.1% |
| 100'000 | 17% | 13–18.4% | 15.3% |
| 110'000 | 17.9% | 13.8–19.3% | 16.3% |
| 120'000 | 18.6% | 14.4–20.1% | 17.2% |
| 130'000 | 19.4% | 15.1–20.9% | 18.1% |
| 140'000 | 20.2% | 15.7–21.8% | 19% |
| 150'000 | 20.9% | 16.4–22.5% | 19.7% |
| 175'000 | 22.7% | 17.8–24.3% | 21.6% |
| 200'000 | 24.1% | 19.1–25.8% | 23.2% |
| 225'000 | 25.3% | 20.1–27% | 24.6% |
| 250'000 | 26.4% | 21.1–28.2% | 25.8% |
| 275'000 | 27.3% | 21.9–29.1% | 26.8% |
| 300'000 | 28% | 22.5–29.8% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20209.1 °C
Precipitation 1991–20201'194 mm
9.1 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
896 m
Mean elevation
644 m
Relief
475 m
Mean slope
13.7°
Flat share
15.0%
South-facing
24.4%
Above 2000 m
0.0%
Relief 475 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
12.5 GWh/yr
Roofs + façades
16.4 GWh/yr
≈ households powered
2'800
Per inhabitant
11'498 kWh/yr
13 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
31.66 Rp./kWh
Energy
13.45 Rp./kWh
Grid usage
13.78 Rp./kWh
Levies + grid surcharge
3.37 Rp./kWh
31.66 Rp./kWh10.5645.88
Canton median 28.51 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Primeo Netz 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
0.85 %
Second homes
11.5 %
Avg. rooms
4.2
Dwellings
590
Built before 194636.4%
Built since 200117.5%
0.85 %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
236
Workplaces
89
Services share
53.8 %
Jobs by sector: Primary 61 (25.8%) · Secondary 48 (20.3%) · Tertiary 127 (53.8%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
20
Organic share
20 %
Farmland
474 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 municipalities1'088 #72 SO · #1406 CHGrowing municipalities0% #62 SO · #1408 CHShrinking municipalities0% #42 SO · #682 CHJobs per resident0.22 #73 SO · #1677 CHFamilies & children18.1% #79 SO · #1648 CHAge structure23.9% #32 SO · #532 CHWomen share50.8% #25 SO · #507 CHForeign residents12.1% #72 SO · #1530 CHPopulation density67/km² #96 SO · #1668 CHTax burden17'010 #70 SO · #1836 CHTaxes125% #65 SOWarmest municipalities9.1 °C #74 SO · #1308 CHSunniest municipalities41% #19 SO · #1412 CHRainiest municipalities1'194 mm #20 SO · #706 CHVoter turnout56.3% #33 SO · #1045 CHAgainst Switzerland22.5% #11 SO · #352 CHAligned with Switzerland77.5% #68 SO · #1088 CHSVP strongholds34.4% #37 SO · #1013 CHSP strongholds8.3% #81 SO · #1676 CHCentre strongholds26.3% #22 SO · #318 CHFDP strongholds13.7% #71 SO · #959 CHGLP strongholds6% #43 SO · #971 CHGreen strongholds6.5% #55 SO · #1209 CHLargest by area16.3 km² #8 SO · #590 CHHighest municipalities544 m #28 SO · #1027 CHSecond homes11.5% #32 SO · #986 CHOrganic farming20% #32 SO · #625 CHBest-connected municipalities49 min #14 SO · #432 CHRemotest municipalities49 min #92 SO · #1670 CHHighest peaks896 m #35 SO · #836 CHHighest-lying municipalities644 m #28 SO · #900 CHGreatest vertical range475 m #29 SO · #715 CHSteepest municipalities13.7° #32 SO · #640 CHSolar potential13 GWh #62 SO · #1385 CHSolar potential per capita11'498 kWh #20 SO · #827 CHCheapest electricity31.66 Rp./kWh #91 SO · #1976 CHMost expensive electricity31.66 Rp./kWh #14 SO · #131 CH
Postal codes (2)
swisstopoLocalities
swisstopo · 2Nearby municipalities
swisstopo- What is the postal code of Seewen?
- Seewen has 2 postal codes: 4204, 4206.
- What is the tax rate in Seewen?
- The municipal tax multiplier of Seewen is 125% (2026); canton SO levies 104%.
- How much tax do you pay in Seewen?
- A single person without children pays about 17'010 CHF income tax in Seewen on 100'000 CHF gross income (federal, cantonal, municipal), rank 64 of 104 in canton SO. Source: ESTV (2026).
- How many residents does Seewen have?
- Seewen has 1'088 residents (2025).
- How many foreign residents live in Seewen?
- Seewen has 132 foreign residents, a share of 12.13% (2025).
Map
OpenStreetMapSeewen compared with
- Seewen vs. Olten
- Seewen vs. Grenchen
- Seewen vs. Solothurn
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- Seewen vs. Dornach
- Seewen vs. Oensingen
- Seewen vs. Balsthal
- Seewen vs. Olten
- Seewen vs. Grenchen
- Seewen vs. Solothurn
- Seewen vs. Zuchwil
- Seewen vs. Biberist
- Seewen vs. Derendingen
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