RANKING · 2010 CENSUS · 39 SHOWN OF 39

Most population lost, Washington counties · 2010

Washington counties that lost the most residents from the 2000 census to 2010, 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

01Garfield County, WAWA2,416-131−188%

02Pacific County, WAWA24,357-64−103%

03Columbia County, WAWA4,141+14−65%

04Wahkiakum County, WAWA4,873+154−69%

05Ferry County, WAWA7,517+291−70%

06Lincoln County, WAWA11,982+386−71%

07Asotin County, WAWA22,545+1,072−64%

08Klickitat County, WAWA24,331+1,157−55%

09Skamania County, WAWA12,669+1,194−25%

10Pend Oreille County, WAWA14,457+1,269−55%

11Okanogan County, WAWA45,230+1,556−75%

12San Juan County, WAWA18,577+1,692−58%

13Adams County, WAWA21,488+2,300−19%

14Stevens County, WAWA49,668+3,465−62%

15Walla Walla County, WAWA62,361+3,601−47%

16Jefferson County, WAWA33,970+3,919−33%

17Whitman County, WAWA48,512+4,036+105%

18Grays Harbor County, WAWA78,144+5,603+86%

19Douglas County, WAWA46,473+5,828−9%

20Chelan County, WAWA81,941+5,837−59%

21Lewis County, WAWA88,062+6,855−26%

22Clallam County, WAWA78,202+6,879−15%

23Island County, WAWA85,657+6,948−39%

24Kittitas County, WAWA48,803+7,553+14%

25Cowlitz County, WAWA114,885+9,462−13%

26Mason County, WAWA71,165+11,294+2%

27Skagit County, WAWA132,975+13,922−41%

28Grant County, WAWA105,727+14,422−28%

29Kitsap County, WAWA283,374+19,164−55%

30Yakima County, WAWA259,185+20,650−39%

31Franklin County, WAWA102,612+28,816+143%

32Benton County, WAWA221,722+32,702+9%

33Whatcom County, WAWA236,392+34,326−12%

34Thurston County, WAWA304,261+44,909−3%

35Spokane County, WAWA558,344+53,282−6%

36Clark County, WAWA532,119+80,125−25%

37Pierce County, WAWA946,288+94,405−18%

38Snohomish County, WAWA870,656+107,311−24%

39King County, WAWA2,344,939+194,215−15%

SHOWING 1–39 OF 39

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS