What is the postal code of Therwil?

Therwil has 2 postal codes: 4106, 4153.

What is the tax rate in Therwil?

The municipal tax multiplier of Therwil is 52% (2026); canton BL levies 100%.

How much tax do you pay in Therwil?

A single person without children pays about 15'536 CHF income tax in Therwil on 100'000 CHF gross income (federal, cantonal, municipal), rank 7 of 86 in canton BL. Source: ESTV (2026).

How many residents does Therwil have?

Therwil has 10'141 residents (2025).

How many foreign residents live in Therwil?

Therwil has 2'046 foreign residents, a share of 20.18% (2025).

Switzerland · Canton BL · Bezirk Arlesheim

Therwil

4106–4153

Relief © swisstopo · TINITALY · geoland.at · LGL · IGN · swissTLM3D · swissTLMRegio

Demographics

BFS · 2025

Women

5'232 51.6%

Men

4'909 48.4%

Children & youth (0–19)

1'961 19.3%

Swiss citizens

8'095 79.8%

Foreign residents

2'046 20.2%

Population density

1'324 pop./km²

0–19 · 1'961 · 19.3%20–64 · 5'631 · 55.5%65+ · 2'549 · 25.1%

Foreign residents 20.2%0%64.0%

Population change 2025: +16 (+0.2%) · 68 births · 109 deaths · net migration +66

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

Vote results for Therwil

BFS

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 Arlesheim: 26.8% Yes

24.1% YesNo 75.9%

27.09.2026Popular Initiative 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict Bezirk Arlesheim: 23.2% Yes

23.1% YesNo 76.9%

27.09.2026Gesetzesinitiative Fairer Kompromiss bei der Mehrwertabgabe: StichfrageCantonal BL● Rejected · 36.3% YesDistrict Bezirk Arlesheim: 34.5% Yes

34.0% YesNo 66.0%

27.09.2026Gesetzesinitiative Fairer Kompromiss bei der Mehrwertabgabe: GegenvorschlagCantonal BL● Rejected · 43.9% YesDistrict Bezirk Arlesheim: 46.0% Yes

45.5% YesNo 54.5%

27.09.2026Gesetzesinitiative Fairer Kompromiss bei der MehrwertabgabeCantonal BL● Rejected · 31.7% YesDistrict Bezirk Arlesheim: 30.5% Yes

30.9% YesNo 69.1%

14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict Bezirk Arlesheim: 50.8% Yes

52.2% YesNo 47.8%

14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict Bezirk Arlesheim: 39.2% Yes

40.4% YesNo 59.6%

14.06.2026Neue Ortsdurchfahrt BirsfeldenCantonal BL● Accepted · 56.2% YesDistrict Bezirk Arlesheim: 58.3% Yes

56.2% YesNo 43.8%

14.06.2026Gesetzesinitiative Energiepolitik nur mit der BevölkerungCantonal BL● Rejected · 44.4% YesDistrict Bezirk Arlesheim: 41.9% Yes

43.6% YesNo 56.4%

14.06.2026Verfassungsinitiative Zämme in EuropaCantonal BL● Accepted · 53.7% YesDistrict Bezirk Arlesheim: 58.0% Yes

57.7% YesNo 42.3%

All federal votes →

Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026

Politics

National Council election 2023

SVP25.5% · strongest party

SVP25.5%

SP22.8%

FDP16.3%

Mitte15.3%

GRÜNE9.1%

sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026

Taxes 2026

ESTV

Municipal tax multiplier52%

Cantonal tax multiplier100%

52%BL range 45%72%

Tax rank 7 of 86 in canton Basel-Landschaft

Tax burden

Single, 100'000 CHF gross income

15'536 CHF(15.5%)

Rank 7 of 86 in the canton · 1115 of 2110 in Switzerland

Median canton 16'264 CHF · median Switzerland 15'290 CHF

Cheapest Pfeffingen 14'899 CHF · most expensive Waldenburg 17'356 CHF

Income tax as % of gross income

100'000 CHF:15'536 CHF(~15.5%)

TherwilCanton range Basel-LandschaftSwitzerland median

Show data table

Gross income	Therwil	Basel-Landschaft	Switzerland median
40'000	6%	5.7–6.7%	5.4%
50'000	8.1%	7.8–9.2%	7.8%
60'000	10.1%	9.7–11.4%	10.5%
70'000	11.8%	11.3–13.2%	11.9%
80'000	13.1%	12.6–14.7%	13.1%
90'000	14.3%	13.7–16%	14.1%
100'000	15.5%	14.9–17.4%	15.3%
110'000	16.7%	16–18.6%	16.3%
120'000	17.7%	17–19.7%	17.2%
130'000	18.6%	17.9–20.7%	18.1%
140'000	19.5%	18.7–21.7%	19%
150'000	20.3%	19.5–22.5%	19.7%
175'000	22.1%	21.3–24.5%	21.6%
200'000	23.7%	22.8–26.2%	23.2%
225'000	25%	24.1–27.6%	24.6%
250'000	26.2%	25.3–28.8%	25.8%
275'000	27.2%	26.3–29.9%	26.8%
300'000	28%	27.1–30.8%	27.4%

2026 · Federal Tax Administration (FTA), retrieved 24.09.2026

Climate

MeteoSwiss 1 km grid · 1991–2020

Annual mean temperature 1991–202010.8 °C

Precipitation 1991–2020946 mm

10.8 °CCH range -5.5°14°

1991–2020 · MeteoSwiss, retrieved 28.08.2026

Terrain

swisstopo · DHM 40 m

Highest point

395 m

Mean elevation

333 m

Relief

99 m

Mean slope

4.1°

Flat share

67.5%

South-facing

11.3%

Above 2000 m

0.0%

Relief 99 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

Solar potential

BFE

Roof potential

50.3 GWh/yr

Roofs + façades

69.7 GWh/yr

≈ households powered

11'200

Per inhabitant

4'960 kWh/yr

50 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 · 2027

Tariff H4

31.61 Rp./kWh

Energy

13.45 Rp./kWh

Grid usage

13.78 Rp./kWh

Levies + grid surcharge

3.32 Rp./kWh

31.61 Rp./kWh10.5645.88

Canton median 31.21 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 · 2024

Premium regionRegion 1

Standard model, deductible 300680 CHF/mo

Ø premium in canton Basel-Landschaft479 CHF/mo

Estimate Switzerland 2026465.3 CHF/mo

Compare health insurers in Therwil →Canton Basel-Landschaft →Premiums explained →

Premiums are set per canton and premium region. This area lies in premium region 1 of canton Basel-Landschaft. Shown is the average adult premium paid across the whole canton Basel-Landschaft (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 · ARE

Vacancy rate

0.86 %

Second homes

7.6 %

Avg. rooms

Dwellings

4'869

Built before 19464.7%

Built since 200124.1%

0.86 %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 · 2024

Jobs

3'401

Workplaces

559

Services share

79.1 %

Jobs by sector: Primary 95 (2.8%) · Secondary 616 (18.1%) · Tertiary 2'690 (79.1%)

STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026

Agriculture

BFS · 2025

Farms

Organic share

26.7 %

Farmland

367 ha

Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026

Accessibility

ARE · NPVM

Major centrePT 26 min · Car 18 min

AgglomerationPT 26 min · Car 18 min

Remoteness 80/86 in canton

National Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026

Municipality

Wikidata · CC0

BFS municipality number2775

Websitetherwil.ch ↗

DistrictBezirk Arlesheim

Wikidata · continuously updated, retrieved 24.09.2026

Where Therwil ranks

Largest municipalities10'141 #11 BL · #179 CH Growing municipalities0.2% #55 BL · #1314 CH Shrinking municipalities0.2% #31 BL · #790 CH Jobs per resident0.34 #31 BL · #1093 CH Families & children19.3% #44 BL · #1366 CH Age structure25.1% #21 BL · #389 CH Women share51.6% #12 BL · #209 CH Foreign residents20.2% #32 BL · #849 CH Population density1'324/km² #12 BL · #147 CH Tax burden15'536 #8 BL · #1116 CH Taxes52% #7 BL Warmest municipalities10.8 °C #17 BL · #129 CH Sunniest municipalities42% #12 BL · #1133 CH Rainiest municipalities946 mm #71 BL · #1830 CH Voter turnout53.2% #47 BL · #1450 CH Against Switzerland5.9% #46 BL · #1410 CH Aligned with Switzerland94.1% #4 BL · #61 CH SVP strongholds25.5% #78 BL · #1537 CH SP strongholds22.8% #29 BL · #281 CH Centre strongholds15.3% #12 BL · #811 CH FDP strongholds16.3% #12 BL · #712 CH GLP strongholds7.8% #16 BL · #612 CH Green strongholds9.1% #44 BL · #690 CH Largest by area7.7 km² #24 BL · #1173 CH Highest municipalities308 m #78 BL · #2050 CH Second homes7.6% #80 BL · #1701 CH Organic farming26.7% #24 BL · #402 CH Best-connected municipalities26 min #8 BL · #54 CH Remotest municipalities26 min #80 BL · #2056 CH Highest peaks395 m #79 BL · #2092 CH Highest-lying municipalities333 m #79 BL · #2081 CH Greatest vertical range99 m #80 BL · #1839 CH Steepest municipalities4.1° #82 BL · #1727 CH Solar potential50 GWh #12 BL · #321 CH Solar potential per capita4'960 kWh #76 BL · #1976 CH Cheapest electricity31.61 Rp./kWh #84 BL · #1974 CH Most expensive electricity31.61 Rp./kWh #3 BL · #133 CH

Postal codes (2)

swisstopo

Localities

swisstopo · 2

Reinach BL4153 Therwil4106

Nearby municipalities

swisstopo

Frequently asked questions

What is the postal code of Therwil?: Therwil has 2 postal codes: 4106, 4153.
What is the tax rate in Therwil?: The municipal tax multiplier of Therwil is 52% (2026); canton BL levies 100%.
How much tax do you pay in Therwil?: A single person without children pays about 15'536 CHF income tax in Therwil on 100'000 CHF gross income (federal, cantonal, municipal), rank 7 of 86 in canton BL. Source: ESTV (2026).
How many residents does Therwil have?: Therwil has 10'141 residents (2025).
How many foreign residents live in Therwil?: Therwil has 2'046 foreign residents, a share of 20.18% (2025).

Map

OpenStreetMap

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