About 5027 Herznach
Herznach-Ueken is a municipality in the district of Laufenburg in the canton of Aargau in Switzerland. It was established on 1 January 2023 with the merger of the municipalities of Herznach and Ueken.
- Canton
- Aargau
- Area
- 11.4 km²
Population
2'667residents
Vacancy
0.50%
Foreign residents
19.2%
Dwellings
1'200
Tax multiplier
110%
Land use across the commune
Every 100 × 100 m of 5027 Herznach, coloured by how it's used. Drawn from the BFS Arealstatistik 2025 release — the most recent nationwide snapshot.
Source BFS Arealstatistik
Loading statistics …
Land use
12% built-up, 57% agricultural, 31% forest. Measured across 1'133 hectares (2018).
Source BFS Arealstatistik
Settlement11.8%
Agriculture56.7%
Forest31.5%
Water0.0%
Election Results
SVP led the 2023 National Council election with 42.0%, ahead of Mitte at 15.4%.
Source BFS
SVP42.0%+0.5 pp
Mitte15.4%
SP13.3%+4.9 pp
FDP10.6%+1.9 pp
GLP5.6%−2.7 pp
Grüne5.4%−4.3 pp
EVP3.3%+1.1 pp
Others
1.0%
2023 vs 2019
Primary / second-home mix
92.1% of dwellings are primary residences; 7.9% are second homes (2026).
Source BFS
Primary residences92.1%
Second homes7.9%
Climate data
Annual mean 10.0°C with 920 mm of rain. Warmest in July (19.4°C), coldest in January (1.2°C). Station: Buchs / Aarau, 387 m.
Source MeteoSchweiz
10.0°C
Annual mean
Mean 10.0°C
Rain 920 mm
Sun ≈127 days
Buchs / Aarau · 387 m.a.s.l. · 1991–2020 normals
Warming trend
Mean annual temperature at Basel / Binningen has risen by +2.4°C between the first 30 observed years (1755–1784) and the most recent (1996–2025).
Source MeteoSchweiz NBCN
+2.4°C
mean 1996–2025 vs. 1755–1784
Basel / Binningen · 316 m.a.s.l. · 1755–2025
