RANKING · 2025 ESTIMATES · 39 SHOWN OF 39

Fastest shrinking, Washington counties

Washington counties with the steepest population decline from the 2020 census to 2025. 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 population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Island County, WAWA85,657-1.4%−20.3 pts

02Walla Walla County, WAWA62,361-0.4%−14.3 pts

03Yakima County, WAWA259,185+1.0%−16.9 pts

04Whitman County, WAWA48,512+1.1%−3.9 pts

05Asotin County, WAWA22,545+1.2%−15.6 pts

06Clallam County, WAWA78,202+1.4%−12.9 pts

07Skagit County, WAWA132,975+2.7%−26.8 pts

08Pierce County, WAWA946,288+2.7%−16.8 pts

09Kitsap County, WAWA283,374+2.8%−19.4 pts

10Jefferson County, WAWA33,970+3.0%−25.8 pts

11Thurston County, WAWA304,261+3.2%−25.4 pts

12Grays Harbor County, WAWA78,144+3.3%−1.4 pts

13King County, WAWA2,344,939+3.3%−11.9 pts

14Spokane County, WAWA558,344+3.5%−12.1 pts

15Chelan County, WAWA81,941+3.6%−23.9 pts

16Cowlitz County, WAWA114,885+3.8%−9.4 pts

17Whatcom County, WAWA236,392+4.2%−26.3 pts

18Adams County, WAWA21,488+4.2%−16.5 pts

19Pacific County, WAWA24,357+4.2%−6.9 pts

20San Juan County, WAWA18,577+4.4%−35.8 pts

21Ferry County, WAWA7,517+4.7%−10.6 pts

22Columbia County, WAWA4,141+4.8%+3.8 pts

23Snohomish County, WAWA870,656+5.2%−25.0 pts

24Skamania County, WAWA12,669+5.3%−13.8 pts

25Garfield County, WAWA2,416+5.7%−0.9 pts

26Clark County, WAWA532,119+5.7%−39.3 pts

27Franklin County, WAWA102,612+6.1%−25.6 pts

28Grant County, WAWA105,727+6.7%−29.8 pts

29Stevens County, WAWA49,668+6.9%−22.5 pts

30Klickitat County, WAWA24,331+7.0%−8.3 pts

31Benton County, WAWA221,722+7.2%−19.4 pts

32Lewis County, WAWA88,062+7.2%−8.4 pts

33Okanogan County, WAWA45,230+7.4%−11.2 pts

34Pend Oreille County, WAWA14,457+7.9%−23.7 pts

35Douglas County, WAWA46,473+8.2%−16.2 pts

36Mason County, WAWA71,165+8.3%−20.6 pts

37Kittitas County, WAWA48,803+10.1%−14.8 pts

38Lincoln County, WAWA11,982+10.2%−4.7 pts

39Wahkiakum County, WAWA4,873+10.2%−4.7 pts

SHOWING 1–39 OF 39

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES