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. The median across all 39 is +2,867. Biggest climber in the top 100 since 2020: Island County, WA, up 25 places to #1.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01▲25Island County, WAWA85,657-1,200−111%

02▲17Walla Walla County, WAWA62,361-223−103%

03Garfield County, WAWA2,416+130−13%

04▼2Columbia County, WAWA4,141+189+373%

05▲2Asotin County, WAWA22,545+260−91%

06▼5Ferry County, WAWA7,517+339−65%

07▼1Wahkiakum County, WAWA4,873+451−9%

08▲9Whitman County, WAWA48,512+539−73%

09▼1Skamania County, WAWA12,669+633−60%

10▲1San Juan County, WAWA18,577+789−80%

11▼1Adams County, WAWA21,488+875−69%

12▲1Pacific County, WAWA24,357+992−53%

13▲3Jefferson County, WAWA33,970+993−83%

14▲8Clallam County, WAWA78,202+1,047−87%

15▼10Pend Oreille County, WAWA14,457+1,056−63%

16▼12Lincoln County, WAWA11,982+1,106−16%

17▼5Klickitat County, WAWA24,331+1,596−37%

18▲11Yakima County, WAWA259,185+2,457−93%

19▼5Grays Harbor County, WAWA78,144+2,508−17%

20▲3Chelan County, WAWA81,941+2,867−80%

21▼12Okanogan County, WAWA45,230+3,126−50%

22▼7Stevens County, WAWA49,668+3,223−65%

23▲5Skagit County, WAWA132,975+3,452−85%

24▼4Douglas County, WAWA46,473+3,535−45%

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

26▼8Kittitas County, WAWA48,803+4,466−33%

27▼6Mason County, WAWA71,165+5,439−51%

28▲2Franklin County, WAWA102,612+5,863−51%

29▼5Lewis County, WAWA88,062+5,913−36%

30▼3Grant County, WAWA105,727+6,604−67%

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

32▲2Thurston County, WAWA304,261+9,468−79%

33▼1Whatcom County, WAWA236,392+9,545−76%

34▼1Benton County, WAWA221,722+14,849−50%

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

36▲2Pierce County, WAWA946,288+25,158−78%

37▼1Clark County, WAWA532,119+28,808−73%

38▼1Snohomish County, WAWA870,656+42,699−70%

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

SHOWING 1–39 OF 39

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