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. The median across all 39 is +4.4%. Biggest climber in the top 100 since 2020: Pierce County, WA, up 25 places to #8.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲22Island County, WAWA85,657-1.4%−20.3 pts

02▲8Walla Walla County, WAWA62,361-0.4%−14.3 pts

03▲6Yakima County, WAWA259,185+1.0%−16.9 pts

04▲8Whitman County, WAWA48,512+1.1%−3.9 pts

05▲1Asotin County, WAWA22,545+1.2%−15.6 pts

06▲7Clallam County, WAWA78,202+1.4%−12.9 pts

07▲17Skagit County, WAWA132,975+2.7%−26.8 pts

08▲25Pierce County, WAWA946,288+2.7%−16.8 pts

09▲11Kitsap County, WAWA283,374+2.8%−19.4 pts

10▲12Jefferson County, WAWA33,970+3.0%−25.8 pts

11▲24Thurston County, WAWA304,261+3.2%−25.4 pts

12▼4Grays Harbor County, WAWA78,144+3.3%−1.4 pts

13▲23King County, WAWA2,344,939+3.3%−11.9 pts

14▲18Spokane County, WAWA558,344+3.5%−12.1 pts

15▲4Chelan County, WAWA81,941+3.6%−23.9 pts

16▼2Cowlitz County, WAWA114,885+3.8%−9.4 pts

17▲13Whatcom County, WAWA236,392+4.2%−26.3 pts

18▲3Adams County, WAWA21,488+4.2%−16.5 pts

19▲8Pacific County, WAWA24,357+4.2%−6.9 pts

20▲11San Juan County, WAWA18,577+4.4%−35.8 pts

21▼20Ferry County, WAWA7,517+4.7%−10.6 pts

22▼20Columbia County, WAWA4,141+4.8%+3.8 pts

23▲11Snohomish County, WAWA870,656+5.2%−25.0 pts

24▼7Skamania County, WAWA12,669+5.3%−13.8 pts

25▼22Garfield County, WAWA2,416+5.7%−0.9 pts

26▲12Clark County, WAWA532,119+5.7%−39.3 pts

27▲12Franklin County, WAWA102,612+6.1%−25.6 pts

28▼2Grant County, WAWA105,727+6.7%−29.8 pts

29▼18Stevens County, WAWA49,668+6.9%−22.5 pts

30▼1Klickitat County, WAWA24,331+7.0%−8.3 pts

31▲6Benton County, WAWA221,722+7.2%−19.4 pts

32▼14Lewis County, WAWA88,062+7.2%−8.4 pts

33▼29Okanogan County, WAWA45,230+7.4%−11.2 pts

34▼27Pend Oreille County, WAWA14,457+7.9%−23.7 pts

35▼7Douglas County, WAWA46,473+8.2%−16.2 pts

36▼21Mason County, WAWA71,165+8.3%−20.6 pts

37▼21Kittitas County, WAWA48,803+10.1%−14.8 pts

38▼33Lincoln County, WAWA11,982+10.2%−4.7 pts

39▼14Wahkiakum County, WAWA4,873+10.2%−4.7 pts

SHOWING 1–39 OF 39

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES