The Montreux Jazz Festival is a music festival in Switzerland, held annually in early July in Montreux on the Lake Geneva shoreline. It is the second-largest annual jazz festival in the world after Canada's Montreal International Jazz Festival.

Montreux is a Swiss municipality and town on the shoreline of Lake Geneva at the foot of the Alps. It belongs to the district of Riviera-Pays-d'Enhaut in the canton of Vaud in Switzerland, and has a population of approximately 26,433, with about 85,000 in the agglomeration Vevey-Montreux as 2019.