400px|right|thumb|Washingtons countyn. Detta är en lista över de 39 countyn som finns i delstaten Washington i USA.National Association of Counties - Find a county
CountyHuvudort (county seat)GrundatAdams County Ritzville 1883Asotin County Asotin 1883Benton County Prosser 1905Chelan County Wenatchee 1899Clallam County Port Angeles 1854Clark County Vancouver 1845Columbia County Dayton 1875Cowlitz County Kelso 1854Douglas County Waterville 1883Ferry County Republic 1899Franklin County Pasco 1883Garfield County Pomeroy 1881Grant County County Ephrata 1909Grays Harbor County Montesano 1854Island County Coupeville 1853Jefferson County Port Townsend 1852King County Seattle 1852Kitsap County Port Orchard 1857Kittitas County Ellensburg 1883Klickitat County Goldendale 1859Lewis County Chehalis 1845Lincoln County Davenport 1883Mason County Shelton 1854Okanogan County Okanogan 1888Pacific County South Bend 1851Pend Oreille County Newport 1911Pierce County Tacoma 1852San Juan County Friday Harbor 1873Skagit County Mount Vernon 1883Skamania County Stevenson 1854Snohomish County Everett 1861Spokane County Spokane 1879Stevens County Colville 1863Thurston County Olympia 1852Wahkiakum County Cathlamet 1854Walla Walla County Walla Walla 1854Whatcom County Bellingham 1854Whitman County Colfax 1871Yakima County Yakima 1865
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Washingtons countyn Washingtons countyn