RANKING · 2020 CENSUS · 39 SHOWN OF 39

Fastest shrinking, Washington counties

Washington counties with the steepest population decline since the prior decennial census. This list covers the 39 counties in Washington that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Ferry County, WAWA7,517-4.9%−132%

02Columbia County, WAWA4,141-3.1%−411%

03Garfield County, WAWA2,416+0.9%−87%

04Okanogan County, WAWA45,230+2.4%−87%

05Lincoln County, WAWA11,982+2.9%−81%

06Asotin County, WAWA22,545+3.1%−82%

07Pend Oreille County, WAWA14,457+3.1%−90%

08Grays Harbor County, WAWA78,144+3.9%−17%

09Yakima County, WAWA259,185+5.5%−69%

10Walla Walla County, WAWA62,361+6.5%−54%

11Stevens County, WAWA49,668+6.7%−77%

12Whitman County, WAWA48,512+7.1%+41%

13Clallam County, WAWA78,202+8.1%−44%

14Cowlitz County, WAWA114,885+8.1%−38%

15Mason County, WAWA71,165+8.3%−71%

16Kittitas County, WAWA48,803+8.4%−66%

17Skamania County, WAWA12,669+8.8%−54%

18Lewis County, WAWA88,062+8.9%−43%

19Chelan County, WAWA81,941+9.1%−67%

20Kitsap County, WAWA283,374+9.7%−56%

21Adams County, WAWA21,488+10.1%−52%

22Jefferson County, WAWA33,970+10.4%−64%

23Island County, WAWA85,657+10.6%−44%

24Skagit County, WAWA132,975+10.8%−63%

25Wahkiakum County, WAWA4,873+11.2%−25%

26Grant County, WAWA105,727+11.2%−69%

27Pacific County, WAWA24,357+11.7%+5%

28Douglas County, WAWA46,473+11.7%−52%

29Klickitat County, WAWA24,331+11.9%−22%

30Whatcom County, WAWA236,392+12.8%−58%

31San Juan County, WAWA18,577+12.8%−68%

32Spokane County, WAWA558,344+14.5%−8%

33Pierce County, WAWA946,288+15.8%−19%

34Snohomish County, WAWA870,656+16.1%−47%

35Thurston County, WAWA304,261+16.9%−41%

36King County, WAWA2,344,939+17.5%+15%

37Benton County, WAWA221,722+18.1%−32%

38Clark County, WAWA532,119+18.3%−59%

39Franklin County, WAWA102,612+23.8%−25%

SHOWING 1–39 OF 39

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES