Population
6'766↓0.7%

City · Solothurn
Oensingen is a municipality in the district of Gäu in the canton of Solothurn in Switzerland.
The rental vacancy rate is 1.20%, 42% below the cantonal average (2.06 %). The municipal tax multiplier (Steuerfuss) is 116%, roughly the cantonal average (117 %) — tax-favourable. Median taxable income is CHF 58'900, 5% below the Swiss median (CHF 61'929). Oensingen has 6'766 residents (2025).
Source: Swiss Federal Statistical Office (BFS).