RANKING · 2025 ESTIMATES · 39 SHOWN OF 39

Most population lost, Washington counties

Washington counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 39 counties in Washington that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Island County, WAWA85,657-1,200−111%

02Walla Walla County, WAWA62,361-223−103%

03Garfield County, WAWA2,416+130−13%

04Columbia County, WAWA4,141+189+373%

05Asotin County, WAWA22,545+260−91%

06Ferry County, WAWA7,517+339−65%

07Wahkiakum County, WAWA4,873+451−9%

08Whitman County, WAWA48,512+539−73%

09Skamania County, WAWA12,669+633−60%

10San Juan County, WAWA18,577+789−80%

11Adams County, WAWA21,488+875−69%

12Pacific County, WAWA24,357+992−53%

13Jefferson County, WAWA33,970+993−83%

14Clallam County, WAWA78,202+1,047−87%

15Pend Oreille County, WAWA14,457+1,056−63%

16Lincoln County, WAWA11,982+1,106−16%

17Klickitat County, WAWA24,331+1,596−37%

18Yakima County, WAWA259,185+2,457−93%

19Grays Harbor County, WAWA78,144+2,508−17%

20Chelan County, WAWA81,941+2,867−80%

21Okanogan County, WAWA45,230+3,126−50%

22Stevens County, WAWA49,668+3,223−65%

23Skagit County, WAWA132,975+3,452−85%

24Douglas County, WAWA46,473+3,535−45%

25Cowlitz County, WAWA114,885+4,155−62%

26Kittitas County, WAWA48,803+4,466−33%

27Mason County, WAWA71,165+5,439−51%

28Franklin County, WAWA102,612+5,863−51%

29Lewis County, WAWA88,062+5,913−36%

30Grant County, WAWA105,727+6,604−67%

31Kitsap County, WAWA283,374+7,763−82%

32Thurston County, WAWA304,261+9,468−79%

33Whatcom County, WAWA236,392+9,545−76%

34Benton County, WAWA221,722+14,849−50%

35Spokane County, WAWA558,344+19,005−66%

36Pierce County, WAWA946,288+25,158−78%

37Clark County, WAWA532,119+28,808−73%

38Snohomish County, WAWA870,656+42,699−70%

39King County, WAWA2,344,939+75,264−67%

SHOWING 1–39 OF 39

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