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King County



Founded: December 22, 1852

King County
Sheriff's Office

516 Third Avenue
Seattle, WA 98104

Phone: 206.296.4155
Web Site
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King County had an estimated population in 2007 of 1,861,300.  By population, King is the largest county in Washington State, and the 12th largest in the United States.  The county has a population comparable to that of the state of Nebraska, or the island of Manhattan.  It has nearly twice the land area of the state of Rhode Island.  The county seat is Seattle, which is the state's largest city. About two-thirds of the county's population lives in the city's suburbs. King County ranks among the 100 highest-income counties in the United States.

The county was formed out of territory within Thurston County on December 22, 1852, by the Oregon Territory legislature, and was named after Alabama resident William Rufus King, vice president under president Franklin Pierce. Seattle was made the county seat on January 11, 1853.

King County originally extended to the Olympic Peninsula. According to historian Bill Speidel, when peninsular prohibitionists threatened to shut down Seattle's saloons, Doc Maynard engineered a peninsular independence movement; King County lost what is now Kitsap County, but preserved its entertainment industry.

On February 24, 1986, the King County Council passed Council Motion 6461, "setting forth the historical basis for the 'renaming' of King County in honor of Reverend Dr. Martin Luther King, Jr.". Because only the state can charter counties, this change was not made official until April 19, 2005

 According to the U.S. Census Bureau, the county has a total area of 2,307 square miles. It is the 11th largest county in Washington by area. 2,126 square miles of it is land and 180 square miles of it is water. 7.82% of the total area is water. The population density is 816 per square mile.


Principal Communities:
  • Algona
  • Auburn (partial)
  • Beaux Arts Village
  • Bellevue
  • Black Diamond
  • Bothell (partial)
  • Burien
  • Carnation
  • Clyde Hill
  • Covington
  • Des Moines
  • Duvall
  • Enumclaw
  • Federal Way
  • Hunts Point
  • Issaquah
  • Kenmore
  • Kent
  • Kirkland
  • Lake Forest Park
  • Maple Valley
  • Medina
  • Mercer Island
  • Milton (partial)
  • Newcastle
  • Normandy Park
  • North Bend
  • Pacific (partial)
  • Redmond
  • Renton
  • Sammamish
  • SeaTac
  • Seattle
  • Shoreline
  • Snoqualmie
  • Skykomish
  • Tukwila
  • Woodinville
  • Yarrow Point
 

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Sheriff Mitzi Johanknecht
Took Office: January 1, 2018

Employees: 1,100
Budget: $138 million

King County Courthouse
County Seat:
Seattle