Demographics
BFS · 2023Women
466 50.0%
Men
466 50.0%
Children & youth (0–19)
205 22.0%
Swiss citizens
785 84.1%
Foreign residents
149 16.0%
0–19 · 205 · 22.0%20–64 · 537 · 57.6%65+ · 190 · 20.4%
Foreign residents 16.0%0%61.6%
Source: BFS/OFS · retrieved 24.07.2026
Recent federal votes
BFS · sd-t-17-0214.06.2026Änderung des Bundesgesetzes über den zivilen Ersatzdienst (Zivildienstgesetz, ZDG)● Switzerland: accepted · turnout 63.8%49.5% yes
14.06.2026Volksinitiative «Keine 10-Millionen-Schweiz! (Nachhaltigkeitsinitiative)»● Switzerland: rejected · turnout 64.2%45.3% yes
08.03.2026Bundesgesetz über die Individualbesteuerung● Switzerland: accepted · turnout 58.8%56.4% yes
08.03.2026Volksinitiative «Für eine gerechte Energie- und Klimapolitik: Investieren für Wohlstand, Arbeit und Umwelt (Klimafonds-Initiative)»● Switzerland: rejected · turnout 58.8%32.8% yes
Source: BFS · retrieved 20.07.2026
Politics
National Council election 2023SVP28.4% · strongest party
SVP28.4%
SP19.7%
Mitte14.5%
GRÜNE13.5%
FDP12.9%
Source: BFS · retrieved 20.07.2026
Taxes 2026
ESTVMunicipal tax multiplier117%
Cantonal tax multiplier104%
117%CH range 25%525%
Tax rank 38 of 104 in canton SolothurnSource: ESTV · retrieved 20.07.2026
Climate
Basel / Binningen · 9.3 kmAnnual mean temperature 202511.8 °C
Precipitation 2025930 mm
11.8 °CCH range -5.5°14°
Source: MeteoSwiss · retrieved 24.07.2026
Municipality
Wikidata · CC0Websitegempen.ch ↗
Source: Wikidata · retrieved 20.07.2026
Postal codes (1)
swisstopoNearby municipalities
swisstopoFrequently asked questions
- What is the postal code of Gempen?
- The postal code of Gempen is 4145.
- What is the tax rate in Gempen?
- The municipal tax multiplier of Gempen is 117% (2026); canton SO levies 104%.
- How many residents does Gempen have?
- Gempen has 932 residents (2023).
- Which canton is Gempen in?
- Gempen is located in canton SO.