King County is a county 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 13th-most populous in the United States. The county seat is Seattle, also the state's most populous city. Originally named after US representative, senator, and then vice president-elect William R. King in 1852, the county government amended its designation in 1986 to honor Martin Luther King Jr., a prominent activist and leader during the civil rights movement. The change was approved by the state government in 2005. It is one of three Washington counties that are included in the Seattle metropolitan area along with Snohomish County to the north and Pierce County to the south. About two-thirds of King County's population lives in Seattle's suburbs, which largely developed in the late 20th century and early 21st century as bedroom communities before becoming job centers for the technology industry.
History When Europeans arrived in the region that would become King County, it was inhabited by several Coast Salish groups. Villages around the site that would become Seattle were primarily populated by the Duwamish people. The Snoqualmie Indian Tribe occupied the area that would become eastern King County. The Green River and White River were home for the Muckleshoot tribal groups. In the first winter after the Denny Party landed at Alki Point, the settlement at the point consisted of a few dozen settlers and over a thousand Native Americans. The local tribes provided the settlers with construction labor, domestic service, and help with subsistence activities. On December 22, 1852, the Oregon Territory legislature formed King County out of territory from within Thurston County. The county was named after Alabamian William R. King, who had just been elected Vice President of the United States under President Franklin Pierce. Seattle was made the county seat on January 11, 1853. The area became part of the Washington Territory when it was created later that year. 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. Coal was discovered in 1853 by M. Bigelow along the Black River, and in subsequent decades several companies formed to mine coal around Lake Washington and deliver it to Seattle. The Seattle and Walla Walla Railroad started servicing the Renton coal fields in 1877, and the Newcastle fields in 1878. By 1880, King County produced 22% of the coal mined on the West Coast, most of that coal being found within the Renton Formation's Muldoon coal seam.
Name
On February 24, 1986, the King County Council approved a motion to rename the county to honor civil rights leader Martin Luther King Jr., preserving the name "King County" while changing its namesake. The motion stated, among other reasons for the change, that "William Rufus DeVane King was a slaveowner" who "earned income and maintained his lifestyle by oppressing and exploiting other human beings," while Martin Luther King's "contributions are well-documented and celebrated by millions throughout this nation and the world, and embody the attributes for which the citizens of King County can be proud, and claim as their own." Because only the state can charter counties, the change was not made official until April 19, 2005, when Governor Christine Gregoire signed into law Senate Bill 5332, which provided that "King county is renamed in honor of the Reverend Doctor Martin Luther King, Jr." effective July 24, 2005. The County Council voted on February 27, 2006, to adopt the proposal sponsored by Councilmember Larry Gossett to change the county's logo from an imperial crown to an image of Martin Luther King Jr. On March 12, 2007, the new logo was unveiled. The new logo design was developed by the Gable Design Group and the specific image was selected by a committee consisting of King County Executive Ron Sims, Council Chair Larry Gossett, Prosecutor Norm Maleng, Sheriff Sue Rahr, District Court Judge Corrina Harn, and Superior Court Judge Michael Trickey. The same logo is used in the flag. Martin Luther King Jr. had visited King County once, for three days in November 1961. He had been invited by longtime friend Reverend Samuel B. McKinney for a set of lectures around the city, sponsored by the Mount Zion Baptist Church.
Geography
According to the United States Census Bureau, the county has a total area of 2,307 square miles (5,980 km2), of which 2,116 square miles (5,480 km2) is land and 191 square miles (490 km2) (8.3%) is water. King County has nearly twice the land area of the state of Rhode Island. The highest point in the county is Mount Daniel at 7,959 feet (2,426 meters) above sea level. King County borders Snohomish County to the north, Chelan County to the northeast, Kittitas County to the east, Pierce County to the south, and Kitsap County to the west. King County includes Vashon Island and Maury Island in Puget Sound. The county has 760 lakes and 3,000 miles (4,800 km) of streams and rivers.
Geographic features
Terrain
Water
National protected areas Klondike Gold Rush National Historical Park (part, also in Skagway, Alaska) Snoqualmie National Forest (part)
Climate change King County has been identified as vulnerable to higher risks of flooding caused by climate change due to the number of waterways in the area. The county's oceanic ecosystems are predicted to face harmful chemical changes, while the mountainous ecosystems could experience a decrease in ice and snow. Since the mid-2000s, the county government has adopted policies to mitigate the effects of climate change and reduce carbon dioxide emissions in the region.
Transportation
Major highways
U.S. Route 2 (the Cascade Highway) only traverses the very northeastern part of the county, along the Skykomish River. This area has no direct road access to the rest of the county.
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