The Canton of Geneva, officially the Republic and Canton of Geneva, is one of the 26 cantons of the Swiss Confederation. It is composed of forty-five municipalities, and the seat of the government and parliament is in the city of Geneva.

Geneva is the French-speaking westernmost canton of Switzerland. It lies at the western end of Lake Geneva and on both sides of the Rhone, its main river. Within the country, the canton borders Vaud to the east, the only adjacent canton. However, most of Geneva's border is with France, specifically the region of Auvergne-Rhône-Alpes.