Kingston is an unincorporated community and census-designated place (CDP) in Kitsap County, Washington, United States. The population was 2,515 at the 2020 census. Kingston is along the shores of Appletree Cove and Puget Sound, and is home to a major Washington State Ferry terminal linking it to Edmonds.

Washington State Ferries (WSF) is a government agency that operates automobile and passenger ferry service in the U.S. state of Washington as part of the Washington State Department of Transportation. It runs ten routes serving 20 terminals located around Puget Sound and in the San Juan Islands, designated as part of the state highway system. The agency maintains a fleet of 21 vessels that are able to carry passengers and vehicles.