Population of Counties in Washington (2018)

Name 2018 Population Growth Rate
King County2,155,96211.28%
Pierce County859,7528.11%
Snohomish County786,94610.00%
Spokane County497,4375.39%
Clark County465,5489.12%
Thurston County273,9238.29%
Kitsap County263,1094.55%
Yakima County249,3232.06%
Whatcom County216,2747.32%
Benton County193,4849.65%
Skagit County123,3905.51%
Cowlitz County104,7562.35%
Grant County93,9044.84%
Franklin County90,31514.19%
Island County81,6383.77%
Lewis County76,6301.50%
Chelan County75,9684.41%
Clallam County74,0983.63%
Grays Harbor County71,625-1.68%
Mason County62,1232.29%
Walla Walla County59,9921.83%
Whitman County48,5288.42%
Kittitas County44,9289.62%
Stevens County44,2141.73%
Okanogan County41,4790.61%
Douglas County41,2727.13%
Jefferson County30,9093.42%
Asotin County22,3102.69%
Klickitat County21,3064.56%
Pacific County21,2091.59%
Adams County19,2622.52%
San Juan County16,2963.24%
Pend Oreille County13,1261.37%
Skamania County11,5934.31%
Lincoln County10,333-2.29%
Ferry County7,542-0.01%
Wahkiakum County4,1764.85%
Columbia County3,997-2.37%
Garfield County2,257-0.18%