of the 39 Counties in Washington the fastest growing County is Franklin County with 23.78% growth. The County lowest growth is Ferry County with -4.94% growth.
List of Counties in Washington With Population Percentage Change | |||||
|---|---|---|---|---|---|
| Map Key | Name | Population Change | Population | ||
| Adams County | 10.07% | 18,575 | |||
| Asotin County | 3.06% | 21,658 | |||
| Benton County | 18.09% | 175,424 | |||
| Chelan County | 9.14% | 72,431 | |||
| Clallam County | 8.05% | 71,411 | |||
| Clark County | 18.33% | 426,984 | |||
| Columbia County | -3.09% | 4,001 | |||
| Cowlitz County | 8.12% | 102,138 | |||
| Douglas County | 11.73% | 38,369 | |||
| Ferry County | -4.94% | 7,584 | |||
| Franklin County | 23.78% | 78,680 | |||
| Garfield County | 0.88% | 2,246 | |||
| Grant County | 11.22% | 88,885 | |||
| Grays Harbor County | 3.9% | 72,272 | |||
| Island County | 10.64% | 78,707 | |||
| Jefferson County | 10.39% | 29,802 | |||
| King County | 17.52% | 1,940,777 | |||
| Kitsap County | 9.75% | 251,400 | |||
| Kittitas County | 8.36% | 40,954 | |||
| Klickitat County | 11.9% | 20,421 | |||
| Lewis County | 8.87% | 75,399 | |||
| Lincoln County | 2.89% | 10,536 | |||
| Mason County | 8.28% | 60,545 | |||
| Okanogan County | 2.39% | 40,959 | |||
| Pacific County | 11.69% | 20,945 | |||
| Pend Oreille County | 3.08% | 12,976 | |||
| Pierce County | 15.83% | 798,528 | |||
| San Juan County | 12.8% | 15,740 | |||
| Skagit County | 10.8% | 117,087 | |||
| Skamania County | 8.77% | 11,053 | |||
| Snohomish County | 16.07% | 714,443 | |||
| Spokane County | 14.46% | 470,375 | |||
| Stevens County | 6.69% | 43,498 | |||
| Thurston County | 16.86% | 252,410 | |||
| Wahkiakum County | 11.16% | 4,003 | |||
| Walla Walla County | 6.47% | 58,643 | |||
| Whatcom County | 12.78% | 201,404 | |||
| Whitman County | 7.14% | 44,997 | |||
| Yakima County | 5.55% | 242,454 | |||