King County is located in the U.S. state of Washington. It is the most populous county in Washington, with a population of 2,233,163 as of the 2019 census estimate. The county seat and largest city is Seattle. King County is home to the University of Washington, Seattle Pacific University, and Seattle University.

The county is governed by a five-member Board of County Commissioners, which is elected by the citizens of King County. The county is divided into 39 cities and towns, and is also home to numerous unincorporated communities.

The county is home to several national parks, including Mount Rainier National Park, Olympic National Park, and North Cascades National Park.

The county is served by King County Metro, which operates the county's bus system, and Sound Transit, which operates the county's light rail system. The county is also served by the King County International Airport.

For the most up-to-date and in-depth information, please check the public records links below.