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.

Flip the list · Fastest growing, US counties →

WashingtonAll states All rankings

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%−107%

02Walla Walla County, WAWA62,361-0.4%−103%

03Yakima County, WAWA259,185+1.0%−95%

04Whitman County, WAWA48,512+1.1%−78%

05Asotin County, WAWA22,545+1.2%−93%

06Clallam County, WAWA78,202+1.4%−90%

07Skagit County, WAWA132,975+2.7%−91%

08Pierce County, WAWA946,288+2.7%−86%

09Kitsap County, WAWA283,374+2.8%−87%

10Jefferson County, WAWA33,970+3.0%−90%

11Thurston County, WAWA304,261+3.2%−89%

12Grays Harbor County, WAWA78,144+3.3%−30%

13King County, WAWA2,344,939+3.3%−78%

14Spokane County, WAWA558,344+3.5%−77%

15Chelan County, WAWA81,941+3.6%−87%

16Cowlitz County, WAWA114,885+3.8%−72%

17Whatcom County, WAWA236,392+4.2%−86%

18Adams County, WAWA21,488+4.2%−80%

19Pacific County, WAWA24,357+4.2%−62%

20San Juan County, WAWA18,577+4.4%−89%

21Ferry County, WAWA7,517+4.7%−69%

22Columbia County, WAWA4,141+4.8%+381%

23Snohomish County, WAWA870,656+5.2%−83%

24Skamania County, WAWA12,669+5.3%−72%

25Garfield County, WAWA2,416+5.7%−14%

26Clark County, WAWA532,119+5.7%−87%

27Franklin County, WAWA102,612+6.1%−81%

28Grant County, WAWA105,727+6.7%−82%

29Stevens County, WAWA49,668+6.9%−76%

30Klickitat County, WAWA24,331+7.0%−54%

31Benton County, WAWA221,722+7.2%−73%

32Lewis County, WAWA88,062+7.2%−54%

33Okanogan County, WAWA45,230+7.4%−60%

34Pend Oreille County, WAWA14,457+7.9%−75%

35Douglas County, WAWA46,473+8.2%−66%

36Mason County, WAWA71,165+8.3%−71%

37Kittitas County, WAWA48,803+10.1%−59%

38Lincoln County, WAWA11,982+10.2%−32%

39Wahkiakum County, WAWA4,873+10.2%−32%

SHOWING 1–39 OF 39

Download CSV (full list, 39 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES