RANKING · 2025 ESTIMATES · 39 SHOWN OF 39

Fastest growing, Washington counties

Washington counties ranked by population growth from the 2020 census to 2025. This list covers the 39 counties in Washington that qualify, ranked against each other statewide. The median across all 39 is +4.4%. Biggest climber in the top 100 since 2020: Lincoln County, WA, up 33 places to #2.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲14Wahkiakum County, WAWA4,873+10.2%−4.7 pts

02▲33Lincoln County, WAWA11,982+10.2%−4.7 pts

03▲21Kittitas County, WAWA48,803+10.1%−14.8 pts

04▲21Mason County, WAWA71,165+8.3%−20.6 pts

05▲7Douglas County, WAWA46,473+8.2%−16.2 pts

06▲27Pend Oreille County, WAWA14,457+7.9%−23.7 pts

07▲29Okanogan County, WAWA45,230+7.4%−11.2 pts

08▲14Lewis County, WAWA88,062+7.2%−8.4 pts

09▼6Benton County, WAWA221,722+7.2%−19.4 pts

10▲1Klickitat County, WAWA24,331+7.0%−8.3 pts

11▲18Stevens County, WAWA49,668+6.9%−22.5 pts

12▲2Grant County, WAWA105,727+6.7%−29.8 pts

13▼12Franklin County, WAWA102,612+6.1%−25.6 pts

14▼12Clark County, WAWA532,119+5.7%−39.3 pts

15▲22Garfield County, WAWA2,416+5.7%−0.9 pts

16▲7Skamania County, WAWA12,669+5.3%−13.8 pts

17▼11Snohomish County, WAWA870,656+5.2%−25.0 pts

18▲20Columbia County, WAWA4,141+4.8%+3.8 pts

19▲20Ferry County, WAWA7,517+4.7%−10.6 pts

20▼11San Juan County, WAWA18,577+4.4%−35.8 pts

21▼8Pacific County, WAWA24,357+4.2%−6.9 pts

22▼3Adams County, WAWA21,488+4.2%−16.5 pts

23▼13Whatcom County, WAWA236,392+4.2%−26.3 pts

24▲2Cowlitz County, WAWA114,885+3.8%−9.4 pts

25▼4Chelan County, WAWA81,941+3.6%−23.9 pts

26▼18Spokane County, WAWA558,344+3.5%−12.1 pts

27▼23King County, WAWA2,344,939+3.3%−11.9 pts

28▲4Grays Harbor County, WAWA78,144+3.3%−1.4 pts

29▼24Thurston County, WAWA304,261+3.2%−25.4 pts

30▼12Jefferson County, WAWA33,970+3.0%−25.8 pts

31▼11Kitsap County, WAWA283,374+2.8%−19.4 pts

32▼25Pierce County, WAWA946,288+2.7%−16.8 pts

33▼17Skagit County, WAWA132,975+2.7%−26.8 pts

34▼7Clallam County, WAWA78,202+1.4%−12.9 pts

35▼1Asotin County, WAWA22,545+1.2%−15.6 pts

36▼8Whitman County, WAWA48,512+1.1%−3.9 pts

37▼6Yakima County, WAWA259,185+1.0%−16.9 pts

38▼8Walla Walla County, WAWA62,361-0.4%−14.3 pts

39▼22Island County, WAWA85,657-1.4%−20.3 pts

SHOWING 1–39 OF 39

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