RANKING · 2010 CENSUS · 39 SHOWN OF 39

Fastest growing, Washington counties · 2010

Washington counties ranked by population growth from the 2000 census to 2010. 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 2000

01Franklin County, WAWA102,612+58.4%+26.7 pts

02Clark County, WAWA532,119+23.2%−21.8 pts

03Benton County, WAWA221,722+23.0%−3.6 pts

04Mason County, WAWA71,165+22.9%−6.0 pts

05Kittitas County, WAWA48,803+22.6%−2.2 pts

06Thurston County, WAWA304,261+21.7%−6.9 pts

07Whatcom County, WAWA236,392+20.6%−10.0 pts

08Grant County, WAWA105,727+19.3%−17.1 pts

09Douglas County, WAWA46,473+17.9%−6.5 pts

10Snohomish County, WAWA870,656+17.7%−12.4 pts

11Jefferson County, WAWA33,970+15.1%−13.7 pts

12Adams County, WAWA21,488+14.0%−6.8 pts

13Skagit County, WAWA132,975+13.5%−15.9 pts

14Pierce County, WAWA946,288+13.5%−6.1 pts

15Spokane County, WAWA558,344+12.7%−2.9 pts

16Skamania County, WAWA12,669+12.1%−7.0 pts

17San Juan County, WAWA18,577+12.0%−28.3 pts

18King County, WAWA2,344,939+11.2%−4.1 pts

19Pend Oreille County, WAWA14,457+10.8%−20.8 pts

20Clallam County, WAWA78,202+10.7%−3.6 pts

21Cowlitz County, WAWA114,885+10.2%−3.0 pts

22Lewis County, WAWA88,062+10.0%−5.6 pts

23Whitman County, WAWA48,512+9.9%+4.8 pts

24Island County, WAWA85,657+9.7%−9.2 pts

25Yakima County, WAWA259,185+9.3%−8.6 pts

26Chelan County, WAWA81,941+8.8%−18.7 pts

27Stevens County, WAWA49,668+8.6%−20.8 pts

28Grays Harbor County, WAWA78,144+8.3%+3.6 pts

29Kitsap County, WAWA283,374+8.3%−14.0 pts

30Walla Walla County, WAWA62,361+6.5%−7.4 pts

31Klickitat County, WAWA24,331+6.0%−9.3 pts

32Asotin County, WAWA22,545+5.2%−11.5 pts

33Wahkiakum County, WAWA4,873+4.0%−10.9 pts

34Ferry County, WAWA7,517+4.0%−11.3 pts

35Okanogan County, WAWA45,230+3.9%−14.7 pts

36Lincoln County, WAWA11,982+3.8%−11.1 pts

37Columbia County, WAWA4,141+0.3%−0.6 pts

38Pacific County, WAWA24,357-0.3%−11.4 pts

39Garfield County, WAWA2,416-5.5%−12.1 pts

SHOWING 1–39 OF 39

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS