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.

The first confirmed case relating to the COVID-19 pandemic in the United States was announced by the state of Washington on January 21, 2020. Washington made the first announcement of a death from the disease in the U.S. on February 29 and later announced that two deaths there on February 26 were also due to COVID-19. Until mid-March, Washington had the highest absolute number of confirmed cases and the highest number per capita of any state in the country, until it was surpassed by New York state on April 10, 2020. Many of the deceased were residents of a nursing home in Kirkland, an Eastside suburb of Seattle in King County.