Vaud ( VOH; French: (Canton de) Vaud, pronounced [kɑ̃tɔ̃ də vo]), more formally Canton of Vaud, is one of the 26 cantons forming the Swiss Confederation. It is composed of ten districts; its capital city is Lausanne. Its coat of arms bears the motto "Liberté et patrie" on a white-green bicolour.

Vaud is the third-largest Swiss canton by population and fourth by size. It is located in Romandy, the French-speaking western part of the country, and borders the Canton of Neuchâtel to the north, the cantons of Fribourg and Bern to the east, the canton of Valais to the south, the Canton of Geneva to the south-west, and France to the west. The geography of the canton includes all three natural regions of Switzerland: the Jura Mountains, the Swiss Plateau, and the (Swiss) Alps .