RANKING · 2000 CENSUS · 39 SHOWN OF 39

Fastest growing, Washington counties · 2000

Washington counties ranked by population growth from the 1990 census to 2000. This list covers the 39 counties in Washington that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS –

01Clark County, WAWA532,119+45.0%–

02San Juan County, WAWA18,577+40.3%–

03Grant County, WAWA105,727+36.4%–

04Franklin County, WAWA102,612+31.7%–

05Pend Oreille County, WAWA14,457+31.6%–

06Whatcom County, WAWA236,392+30.5%–

07Snohomish County, WAWA870,656+30.1%–

08Stevens County, WAWA49,668+29.5%–

09Skagit County, WAWA132,975+29.4%–

10Mason County, WAWA71,165+28.9%–

11Jefferson County, WAWA33,970+28.8%–

12Thurston County, WAWA304,261+28.6%–

13Chelan County, WAWA81,941+27.5%–

14Benton County, WAWA221,722+26.6%–

15Kittitas County, WAWA48,803+24.8%–

16Douglas County, WAWA46,473+24.4%–

17Kitsap County, WAWA283,374+22.3%–

18Adams County, WAWA21,488+20.8%–

19Pierce County, WAWA946,288+19.6%–

20Skamania County, WAWA12,669+19.1%–

21Island County, WAWA85,657+18.9%–

22Okanogan County, WAWA45,230+18.6%–

23Yakima County, WAWA259,185+17.9%–

24Asotin County, WAWA22,545+16.7%–

25Spokane County, WAWA558,344+15.7%–

26Lewis County, WAWA88,062+15.6%–

27Ferry County, WAWA7,517+15.3%–

28Klickitat County, WAWA24,331+15.3%–

29King County, WAWA2,344,939+15.2%–

30Wahkiakum County, WAWA4,873+14.9%–

31Lincoln County, WAWA11,982+14.9%–

32Clallam County, WAWA78,202+14.3%–

33Walla Walla County, WAWA62,361+13.9%–

34Cowlitz County, WAWA114,885+13.2%–

35Pacific County, WAWA24,357+11.1%–

36Garfield County, WAWA2,416+6.6%–

37Whitman County, WAWA48,512+5.1%–

38Grays Harbor County, WAWA78,144+4.7%–

39Columbia County, WAWA4,141+1.0%–

SHOWING 1–39 OF 39

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