Demographics
BFS · 2025Women
9'521 50.3%
Men
9'422 49.7%
Children & youth (0–19)
3'733 19.7%
Swiss citizens
14'429 76.2%
Foreign residents
4'514 23.8%
Population density
689 pop./km²
0–19 · 3'733 · 19.7%20–64 · 11'109 · 58.6%65+ · 4'101 · 21.6%
Foreign residents 23.8%0%64.0%
Population change 2025: +310 (+1.7%) · 177 births · 157 deaths · net migration +305
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
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Wahlkreis St. Gallen: 53.1% Yes
63.6% YesNo 36.4%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Wahlkreis St. Gallen: 40.9% Yes
52.9% YesNo 47.2%
14.06.2026Gesetz über Beiträge für familien- und schulergänzende KinderbetreuungCantonal SG● Accepted · 57.8% YesDistrict Wahlkreis St. Gallen: 67.7% Yes
59.5% YesNo 40.5%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict Wahlkreis St. Gallen: 49.9% Yes
41.5% YesNo 58.5%
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 Wahlkreis St. Gallen: 29.0% Yes
17.6% YesNo 82.4%
08.03.2026Popular Initiative ‘200 francs is enough! (SBC Initiative)’Federal● Rejected · 38.1% YesDistrict Wahlkreis St. Gallen: 36.7% Yes
44.9% YesNo 55.1%
08.03.2026Cash Initiative and Counter-Proposal: Deciding QuestionFederal● Rejected · 37.4% YesDistrict Wahlkreis St. Gallen: 33.0% Yes
39.0% YesNo 61.0%
08.03.2026Federal decree on Swiss currency and cash supply (counter-proposal to Cash Initiative)Federal● Accepted · 73.4% YesDistrict Wahlkreis St. Gallen: 76.2% Yes
74.2% YesNo 25.8%
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 25.09.2026
Politics
National Council election 2023SVP36.2% · strongest party
SVP36.2%
Mitte21.7%
FDP14.4%
SP11.7%
GRÜNE6.5%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Taxes 2026
ESTVMunicipal tax multiplier116%
Cantonal tax multiplier105%
116%SG range 61%155%
Tax rank 42 of 75 in canton St. GallenTax burden
Single, 100'000 CHF gross income
13'923 CHF(13.9%)
Rank 40 of 75 in the canton · 818 of 2110 in Switzerland
Median canton 13'868 CHF · median Switzerland 15'290 CHF
Cheapest Balgach 10'881 CHF · most expensive Lütisburg 16'080 CHF
100'000 CHF:13'923 CHF(~13.9%)
GossauCanton range St. GallenSwitzerland median
Show data table
| Gross income | Gossau | St. Gallen | Switzerland median |
|---|---|---|---|
| 40'000 | 6.2% | 4.8–7.3% | 5.4% |
| 50'000 | 8% | 6.1–9.3% | 7.8% |
| 60'000 | 9.6% | 7.4–11.2% | 10.5% |
| 70'000 | 10.8% | 8.3–12.5% | 11.9% |
| 80'000 | 11.9% | 9.2–13.8% | 13.1% |
| 90'000 | 12.9% | 10–14.9% | 14.1% |
| 100'000 | 13.9% | 10.9–16.1% | 15.3% |
| 110'000 | 14.8% | 11.7–17.1% | 16.3% |
| 120'000 | 15.6% | 12.3–18% | 17.2% |
| 130'000 | 16.3% | 12.9–18.7% | 18.1% |
| 140'000 | 17% | 13.6–19.5% | 19% |
| 150'000 | 17.7% | 14.1–20.2% | 19.7% |
| 175'000 | 19.1% | 15.4–21.8% | 21.6% |
| 200'000 | 20.4% | 16.5–23.1% | 23.2% |
| 225'000 | 21.4% | 17.5–24.2% | 24.6% |
| 250'000 | 22.4% | 18.4–25.2% | 25.8% |
| 275'000 | 23.2% | 19.1–26.1% | 26.8% |
| 300'000 | 23.8% | 19.7–26.7% | 27.4% |
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026
Climate
MeteoSwiss 1 km grid · 1991–2020Annual mean temperature 1991–20208.8 °C
Precipitation 1991–20201'312 mm
8.8 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026
Terrain
swisstopo · DHM 40 mHighest point
805 m
Mean elevation
657 m
Relief
250 m
Mean slope
5.2°
Flat share
61.2%
South-facing
8.3%
Above 2000 m
0.0%
Relief 250 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
147.5 GWh/yr
Roofs + façades
197.8 GWh/yr
≈ households powered
32'800
Per inhabitant
7'784 kWh/yr
147 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 range H4
25.25–29.86 Rp./kWh
27.56 Rp./kWh10.5645.88
Canton median 30.11 Rp./kWhSwiss median 26.53 Rp./kWh
Network operators Stadtwerke Gossau · Elektra Niederbüren Stromversorgung
ElCom tariff comparison ↗This municipality is served by 2 network operators with different tariffs; the range spans the cheapest and the most expensive.
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 · 2024Premium regionRegion 1
Standard model, deductible 300577 CHF/mo
Ø premium in canton St. Gallen377 CHF/mo
Estimate Switzerland 2026465.3 CHF/mo
Premiums are set per canton and premium region. This area lies in premium region 1 of canton St. Gallen. Shown is the average adult premium paid across the whole canton St. Gallen (2024, BAG) — a region-specific average is not available in the cantonal data.
2024 · Federal Office of Public Health (FOPH), retrieved 12.09.2026
Housing
BFS · AREVacancy rate
1.24 %
Second homes
8.3 %
Avg. rooms
3.9
Dwellings
9'019
Built before 194616.2%
Built since 200119.7%
1.24 %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
13'674
Workplaces
1'294
Services share
64.8 %
Jobs by sector: Primary 324 (2.4%) · Secondary 4'485 (32.8%) · Tertiary 8'865 (64.8%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026
Agriculture
BFS · 2025Farms
87
Organic share
10.3 %
Farmland
1'720 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 municipalities18'943 #4 SG · #64 CHGrowing municipalities1.7% #7 SG · #465 CHShrinking municipalities1.7% #70 SG · #1645 CHJobs per resident0.72 #5 SG · #213 CHFamilies & children19.7% #58 SG · #1249 CHAge structure21.6% #22 SG · #931 CHWomen share50.3% #16 SG · #736 CHForeign residents23.8% #33 SG · #605 CHPopulation density689/km² #26 SG · #367 CHTax burden13'923 #40 SG · #818 CHTaxes116% #42 SGWarmest municipalities8.8 °C #50 SG · #1464 CHSunniest municipalities40.1% #62 SG · #1819 CHRainiest municipalities1'312 mm #30 SG · #471 CHVoter turnout53.2% #43 SG · #1320 CHAgainst Switzerland14% #62 SG · #1015 CHAligned with Switzerland86% #21 SG · #471 CHSVP strongholds36.2% #47 SG · #888 CHSP strongholds11.7% #21 SG · #1334 CHCentre strongholds21.7% #31 SG · #460 CHFDP strongholds14.4% #36 SG · #885 CHGLP strongholds5.6% #21 SG · #1060 CHGreen strongholds6.5% #40 SG · #1214 CHLargest by area27.5 km² #27 SG · #333 CHHighest municipalities638 m #24 SG · #724 CHSecond homes8.3% #64 SG · #1555 CHOrganic farming10.3% #41 SG · #1202 CHBest-connected municipalities98 min #35 SG · #1678 CHRemotest municipalities98 min #42 SG · #429 CHHighest peaks805 m #46 SG · #984 CHHighest-lying municipalities657 m #37 SG · #864 CHGreatest vertical range250 m #52 SG · #1142 CHSteepest municipalities5.2° #62 SG · #1529 CHSolar potential147 GWh #3 SG · #32 CHSolar potential per capita7'784 kWh #48 SG · #1516 CHCheapest electricity27.56 Rp./kWh #14 SG · #1180 CHMost expensive electricity27.56 Rp./kWh #61 SG · #927 CH
Postal codes (6)
swisstopoLocalities
swisstopo · 6Nearby municipalities
swisstopo- What is the postal code of Gossau?
- Gossau has 6 postal codes: 9015, 9030, 9100, 9200, 9204, 9212.
- What is the tax rate in Gossau?
- The municipal tax multiplier of Gossau is 116% (2026); canton SG levies 105%.
- How much tax do you pay in Gossau?
- A single person without children pays about 13'923 CHF income tax in Gossau on 100'000 CHF gross income (federal, cantonal, municipal), rank 40 of 75 in canton SG. Source: ESTV (2026).
- How many residents does Gossau have?
- Gossau has 18'943 residents (2025).
- How many foreign residents live in Gossau?
- Gossau has 4'514 foreign residents, a share of 23.83% (2025).
Map
OpenStreetMapGossau compared with
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