Kingston (formerly Apple Tree Cove) is a census-esignated place (CDP) in Kitsap County, Washington, United States. The population was 1,611 at the 2000 census. Kingston is along the shores of Apple Tree Cove and the Puget Sound, and is home to a major Washington State Ferries terminal linking it to Edmonds. Kingston's schools include Kingston Co-op Preschool, Gordon Elementary, Kingston Middle School, Spectrum Community School, Wolfle Elementary and the new Kingston High School which opened in September.