Population of Counties in (2018)

Name 2018 Population Growth Since 2010
King County2,188,64912.97%
Pierce County876,76410.25%
Snohomish County801,63312.05%
Spokane County506,1527.23%
Clark County474,64311.25%
Thurston County280,58810.92%
Kitsap County266,4145.86%
Yakima County250,1932.42%
Whatcom County221,4049.87%
Benton County198,17112.30%
Skagit County125,6197.41%
Cowlitz County106,9104.45%
Grant County95,1586.24%
Franklin County92,12516.48%
Island County83,1595.71%
Lewis County78,2003.58%
Chelan County76,5335.18%
Clallam County75,4745.56%
Grays Harbor County72,697-0.21%
Mason County63,7104.90%
Walla Walla County60,5672.80%
Whitman County49,0469.57%
Kittitas County46,20512.74%
Stevens County44,7302.92%
Douglas County41,9458.88%
Okanogan County41,7421.25%
Jefferson County31,2344.51%
Asotin County22,5353.73%
Klickitat County21,8117.04%
Pacific County21,6263.59%
Adams County19,5063.82%
San Juan County16,7155.90%
Pend Oreille County13,3543.14%
Skamania County11,8376.51%
Lincoln County10,5790.04%
Ferry County7,5940.68%
Wahkiakum County4,2647.05%
Columbia County4,047-1.15%
Garfield County2,210-2.26%