Washington's 1st congressional district
Washington's 1st congressional district encompasses parts of King and Snohomish counties. The district covers several cities in the north of the Seattle metropolitan area, east of Interstate 5, including parts of Bellevue, Marysville, and up north toward Arlington.
Image: William E Humphrey
Image: John F. Miller, 1921
Image: Ralph Horr
Image: Hugh De Lacy
King County is located in the U.S. state of Washington. The population was 2,269,675 in the 2020 census, making it the most populous county in Washington, and the 12th-most populous in the United States. The county seat is Seattle, also the state's most populous city.
City Hall Park and King County Courthouse in downtown Seattle
The Cascade Range (including Granite Mountain shown here) dominates the eastern part of King County.