King County, Washington

county in the state of Washington, United States

King County is a county in the U.S. state of Washington. The population was 2,188,649 in the 2017 census estimate. King is the most populous county in Washington. The county seat is Seattle,[1] which is the state's largest city.

King County is one of three Washington counties that are included in the SeattleTacomaBellevue metropolitan statistical area. About two-thirds of King County's population lives in Seattle's suburbs.


  1. "Court Directory: County-City Reference List". Washington Courts. Retrieved 2017-05-07.