Leavenworth is a city in Chelan County, Washington, United States. It is part of the Wenatchee−East Wenatchee Metropolitan Statistical Area. The population was 1,965 at the 2010 census. The entire town center is modeled on a Bavarian village.
Lafayette Lamb arrived in 1903 from Clinton, Iowa to build the second largest sawmill in Washington state.
Leavenworth was officially incorporated on September 5, 1906. A small timber community, it became the headquarters of the Great Northern Railway in the early 1900s. The railroad relocated to Wenatchee in the 1920s, greatly affecting Leavenworth's economy.