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Demographics

BFS · 2025
Women
210 50.2%
Men
208 49.8%
Children & youth (0–19)
94 22.5%
Swiss citizens
364 87.1%
Foreign residents
54 12.9%
Population density
62 pop./km²
0–19 · 94 · 22.5%20–64 · 240 · 57.4%65+ · 84 · 20.1%
Foreign residents 12.9%0%64.0%
Population change 2025: −14 (−3.2%) · 2 births · 3 deaths · net migration −13
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 'Safeguard Swiss neutrality (Neutrality Initiative)'Federal● Rejected · 29.8% YesDistrict District de Morges: 25.7% Yes
28.0% YesNo 72.1%
27.09.2026Initiative populaire « Baisse d’impôts pour tous — Redonner du pouvoir d’achat à la classe moyenne »Cantonal VD● Accepted · 53.9% YesDistrict District de Morges: 54.3% Yes
59.4% YesNo 40.6%
14.06.2026Amendment to the Civilian Service ActFederal● Accepted · 52.5% YesDistrict District de Morges: 47.9% Yes
49.0% YesNo 51.0%
14.06.2026Popular initiative: 'No to Switzerland of 10 million! (Sustainability Initiative)'Federal● Rejected · 45.2% YesDistrict District de Morges: 35.6% Yes
42.5% YesNo 57.5%
14.06.2026Question subsidiaireCantonal VD● Rejected · 47.3% YesDistrict District de Morges: 39.0% Yes
39.2% YesNo 60.8%
14.06.2026Contre-projet législatif « Loi sur le salaire minimum »Cantonal VD● Rejected · 49.7% YesDistrict District de Morges: 49.2% Yes
53.8% YesNo 46.2%
14.06.2026Initiative populaire législative « Pour le droit de vivre dignement de son travail – pour un salaire minimum cantonal »Cantonal VD● Rejected · 49.3% YesDistrict District de Morges: 42.3% Yes
39.2% YesNo 60.8%
14.06.2026Initiative populaire constitutionnelle « Pour le droit de vivre dignement de son travail – pour un salaire minimum cantonal »Cantonal VD● Accepted · 51.7% YesDistrict District de Morges: 44.7% Yes
41.8% YesNo 58.2%
08.03.2026Federal Act on Individual TaxationFederal● Accepted · 54.3% YesDistrict District de Morges: 67.4% Yes
69.4% YesNo 30.7%
All federal votes →
Popular votes (sd-t-17-02) 2026 · Federal Statistical Office (FSO), retrieved 04.10.2026

Politics

National Council election 2023
SVP25.4% · strongest party
SVP25.4%
SP21.5%
FDP20.6%
GRÜNE15.9%
GLP7.4%
sd-t-17.02-NRW2023 2023 · Federal Statistical Office (FSO), retrieved 25.09.2026
Municipal tax multiplier76%
Cantonal tax multiplier155%
76%VD range 46%83%
Tax rank 255 of 300 in canton Vaud
Tax burden
Single, 100'000 CHF gross income
16'554 CHF(16.6%)
Rank 245 of 300 in the canton · 1611 of 2110 in Switzerland
Median canton 16'155 CHF · median Switzerland 15'290 CHF
Cheapest Eclépens 14'558 CHF · most expensive La Praz 17'020 CHF
Income tax as % of gross income
0%9%18%26%35%40k50k100k150k200k250k300k
100'000 CHF:16'554 CHF(~16.6%)
La Chaux (Cossonay)Canton range VaudSwitzerland median
Show data table
Gross incomeLa Chaux (Cossonay)VaudSwitzerland median
40'0004.2%3.7–4.3%5.4%
50'0007.8%6.9–8.1%7.8%
60'00011.5%10–11.8%10.5%
70'00013.7%11.9–14.1%11.9%
80'00014.6%12.8–15.1%13.1%
90'00015.4%13.5–15.9%14.1%
100'00016.6%14.6–17%15.3%
110'00017.5%15.4–18%16.3%
120'00018.5%16.3–19%17.2%
130'00019.3%17.1–19.9%18.1%
140'00020.2%17.9–20.8%19%
150'00021%18.6–21.6%19.7%
175'00023%20.5–23.6%21.6%
200'00024.7%22.1–25.4%23.2%
225'00026.3%23.5–26.9%24.6%
250'00027.7%24.8–28.4%25.8%
275'00029%26–29.6%26.8%
300'00030%27–30.7%27.4%
2026 · Federal Tax Administration (FTA), retrieved 24.09.2026

Climate

MeteoSwiss 1 km grid · 1991–2020
Annual mean temperature 1991–202010.2 °C
Precipitation 1991–20201'032 mm
10.2 °CCH range -5.5°14°
1991–2020 · MeteoSwiss, retrieved 28.08.2026

Terrain

swisstopo · DHM 40 m
Highest point
623 m
Mean elevation
578 m
Relief
93 m
Mean slope
4.7°
Flat share
65.4%
South-facing
3.6%
Above 2000 m
0.0%
Relief 93 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
5.6 GWh/yr
Roofs + façades
7.3 GWh/yr
≈ households powered
1'200
Per inhabitant
13'445 kWh/yr
6 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
27.89 Rp./kWh
Energy
13.01 Rp./kWh
Grid usage
10.18 Rp./kWh
Levies + grid surcharge
2.92 Rp./kWh
27.89 Rp./kWh10.5645.88
Canton median 29.09 Rp./kWhSwiss median 26.53 Rp./kWh
Network operator Romande Energie SA
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
Premium regionRegion 2
Standard model, deductible 300663 CHF/mo
Ø premium in canton Vaud477 CHF/mo
Estimate Switzerland 2026465.3 CHF/mo

Premiums are set per canton and premium region. This area lies in premium region 2 of canton Vaud. Shown is the average adult premium paid across the whole canton Vaud (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
1.06 %
Second homes
8.6 %
Avg. rooms
4.2
Dwellings
188
Built before 194672.3%
Built since 200111.2%
1.06 %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
56
Workplaces
35
Services share
51.8 %
Jobs by sector: Primary 19 (33.9%) · Secondary 8 (14.3%) · Tertiary 29 (51.8%)
STATENT (Statistik der Unternehmensstruktur) 2024 · Federal Statistical Office (FSO), retrieved 24.09.2026

Agriculture

BFS · 2025
Farms
10
Organic share
10 %
Farmland
464 ha
Landwirtschaftliche Strukturerhebung 2025 · Federal Statistical Office (FSO), retrieved 19.09.2026

Accessibility

ARE · NPVM
Major centrePT 53 min · Car 29 min
AgglomerationPT 53 min · Car 29 min
Remoteness 151/300 in canton
National Passenger Transport Model (NPVM) 2025 · Federal Office for Spatial Development (ARE), retrieved 24.09.2026

Municipality

Wikidata · CC0
BFS municipality number5474
Head of governmentBrigitte Dufour-Fallot
Wikidata · continuously updated, retrieved 24.09.2026
Largest municipalities418 #233 VD · #1879 CHGrowing municipalities-3.2% #288 VD · #2062 CHShrinking municipalities-3.2% #13 VD · #48 CHJobs per resident0.13 #276 VD · #2044 CHFamilies & children22.5% #154 VD · #429 CHAge structure20.1% #73 VD · #1231 CHWomen share50.2% #143 VD · #820 CHForeign residents12.9% #248 VD · #1455 CHPopulation density62/km² #239 VD · #1700 CHTax burden16'554 #250 VD · #1616 CHTaxes76% #255 VDWarmest municipalities10.2 °C #106 VD · #360 CHSunniest municipalities44.3% #197 VD · #779 CHRainiest municipalities1'032 mm #174 VD · #1481 CHVoter turnout62.5% #130 VD · #378 CHSVP strongholds25.4% #135 VD · #1542 CHSP strongholds21.5% #134 VD · #362 CHCentre strongholds2.3% #289 VD · #2042 CHFDP strongholds20.6% #197 VD · #418 CHGLP strongholds7.4% #144 VD · #690 CHGreen strongholds15.9% #27 VD · #98 CHLargest by area6.7 km² #130 VD · #1308 CHHighest municipalities559 m #157 VD · #974 CHSecond homes8.6% #209 VD · #1495 CHOrganic farming10% #149 VD · #1236 CHBest-connected municipalities53 min #146 VD · #575 CHRemotest municipalities53 min #151 VD · #1558 CHHighest peaks623 m #183 VD · #1451 CHHighest-lying municipalities578 m #158 VD · #1097 CHGreatest vertical range93 m #239 VD · #1863 CHSteepest municipalities4.7° #181 VD · #1633 CHSolar potential6 GWh #225 VD · #1863 CHSolar potential per capita13'445 kWh #100 VD · #580 CHCheapest electricity27.89 Rp./kWh #26 VD · #1239 CHMost expensive electricity27.89 Rp./kWh #197 VD · #790 CH

Localities

swisstopo · 3
What is the postal code of La Chaux (Cossonay)?
La Chaux (Cossonay) has 3 postal codes: 1148, 1308, 1316.
What is the tax rate in La Chaux (Cossonay)?
The municipal tax multiplier of La Chaux (Cossonay) is 76% (2026); canton VD levies 155%.
How much tax do you pay in La Chaux (Cossonay)?
A single person without children pays about 16'554 CHF income tax in La Chaux (Cossonay) on 100'000 CHF gross income (federal, cantonal, municipal), rank 245 of 300 in canton VD. Source: ESTV (2026).
How many residents does La Chaux (Cossonay) have?
La Chaux (Cossonay) has 418 residents (2025).
How many foreign residents live in La Chaux (Cossonay)?
La Chaux (Cossonay) has 54 foreign residents, a share of 12.92% (2025).

Map

OpenStreetMap