About Hornussen
Hornussen is a former municipality in the district of Laufenburg in the canton of Aargau in Switzerland. On 1 January 2022 the former municipalities of Bözen, Effingen, Elfingen and Hornussen merged into the new municipality of Böztal.
- Canton
- Aargau
- Area
- 22.3 km²
Population
2'940residents
Median taxable income
CHF 69'061
Vacancy
0.79%
Foreign residents
20.4%
Dwellings
1'392
Tax multiplier
114%
Land use across the commune
Every 100 × 100 m of Hornussen, 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
10% built-up, 48% agricultural, 41% forest. Measured across 2'231 hectares (2018).
Source BFS Arealstatistik
Settlement10.2%
Agriculture48.6%
Forest41.3%
Water0.0%
Election Results
SVP led the 2023 National Council election with 50.4%, ahead of SP at 13.8%.
Source BFS
SVP50.4%+6.0 pp
SP13.8%+0.1 pp
Mitte10.9%
FDP6.6%−0.8 pp
GLP6.3%−1.2 pp
Grüne5.3%−1.6 pp
EVP2.7%+0.3 pp
Others
1.3%
2023 vs 2019
Primary / second-home mix
86.6% of dwellings are primary residences; 13.4% are second homes (2026).
Source BFS
Primary residences86.6%
Second homes13.4%
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 Zürich / Fluntern has risen by +2.2°C between the first 30 observed years (1864–1893) and the most recent (1996–2025).
Source MeteoSchweiz NBCN
+2.2°C
mean 1996–2025 vs. 1864–1893
Zürich / Fluntern · 556 m.a.s.l. · 1864–2025
