Population
4'968↑1.5%

Municipality · Vaud
Cossonay is a municipality in the canton of Vaud in Switzerland. It is part of the district of Morges.
The rental vacancy rate is 0.38%, 59% below the cantonal average (0.92 %). The municipal tax multiplier (Steuerfuss) is 66%, 5% below the cantonal average (69 %) — tax-favourable. Median taxable income is CHF 59'850, 3% below the Swiss median (CHF 61'929). Cossonay has 4'968 residents (2025).
Source: Swiss Federal Statistical Office (BFS).