RANKING · 2000 CENSUS · 39 SHOWN OF 39

Most sparsely populated, Washington counties · 2000

Washington counties with the fewest residents per square mile (2023). 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 growing Fastest shrinking Most densely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Ferry County, WAWA7,5173+0%

02Garfield County, WAWA2,4163+0%

03Lincoln County, WAWA11,9824+0%

04Columbia County, WAWA4,1415+0%

05Skamania County, WAWA12,6696+0%

06Okanogan County, WAWA45,2308+0%

07Pend Oreille County, WAWA14,4578+0%

08Adams County, WAWA21,4889+0%

09Klickitat County, WAWA24,33110+0%

10Jefferson County, WAWA33,97014+0%

11Kittitas County, WAWA48,80315+0%

12Wahkiakum County, WAWA4,87315+0%

13Stevens County, WAWA49,66816+0%

14Douglas County, WAWA46,47318+0%

15Whitman County, WAWA48,51219+0%

16Pacific County, WAWA24,35722+0%

17Chelan County, WAWA81,94123+0%

18Grant County, WAWA105,72728+0%

19Lewis County, WAWA88,06229+0%

20Asotin County, WAWA22,54532+0%

21Grays Harbor County, WAWA78,14435+0%

22Clallam County, WAWA78,20237+0%

23Franklin County, WAWA102,61240+0%

24Walla Walla County, WAWA62,36143+0%

25Mason County, WAWA71,16551+0%

26Yakima County, WAWA259,18552+0%

27Skagit County, WAWA132,97560+0%

28Whatcom County, WAWA236,39279+0%

29San Juan County, WAWA18,57781+0%

30Cowlitz County, WAWA114,88581+0%

31Benton County, WAWA221,72284+0%

32Spokane County, WAWA558,344237+0%

33Thurston County, WAWA304,261287+0%

34Snohomish County, WAWA870,656290+0%

35Island County, WAWA85,657343+0%

36Pierce County, WAWA946,288420+0%

37Clark County, WAWA532,119549+0%

38Kitsap County, WAWA283,374587+0%

39King County, WAWA2,344,939821+0%

SHOWING 1–39 OF 39

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES