Wädenswil, locally often called Wädi or Wädischwil, is a municipality located in the district of Horgen in the canton of Zürich in Switzerland. The population, as of 2013, was about 21,000. On 1 January 2019 the former municipalities of Hütten and Schönenberg were merged into the municipality of Wädenswil.

The canton of Zürich is a Swiss canton in the northeastern part of the country. With a population of 1,553,423, it is the most populous canton in the country. Zürich is the de facto capital of the canton, but is not specifically mentioned in the constitution. The official language is German. The local Swiss German dialect, called Züritüütsch, is commonly spoken.