Leavenworth is a city in Chelan County, Washington, United States. It is part of the Wenatchee−East Wenatchee Metropolitan Statistical Area. The population was 2,263 at the 2020 census. The entire town center is modeled on a German Bavarian village as part of a civic initiative that began in the 1960s. The area is a major, four-season tourist destination with festivals nearly every month and a multitude of events year round.

Chelan County is a county in the U.S. state of Washington. As of the 2020 census, its population was 79,074. The county seat and largest city is Wenatchee. The county was created out of Okanogan and Kittitas Counties on March 13, 1899. It derives its name from a Chelan Indian word meaning "deep water," likely a reference to 55-mile (89 km)-long Lake Chelan, which reaches a maximum depth of 1,486 feet (453 m).