RANKING · 1990 CENSUS · 39 SHOWN OF 39

Least racially diverse, Washington counties · 1990

Washington counties with the lowest CensusEasy Diversity Score, where most residents share the same race or ethnicity (1990 ACS). This list covers the 39 counties in Washington that qualify, ranked against each other statewide. The median across all 39 is 20.

Flip the list · Most racially diverse, US counties →

WashingtonAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPDIVERSITY SCOREVS –

01Garfield County, WAWA2,4162–

02Lincoln County, WAWA11,9827–

03Asotin County, WAWA22,5458–

04San Juan County, WAWA18,5778–

05Pend Oreille County, WAWA14,4578–

06Lewis County, WAWA88,06211–

07Kittitas County, WAWA48,80313–

08Skamania County, WAWA12,66913–

09Jefferson County, WAWA33,97014–

10Cowlitz County, WAWA114,88514–

11Wahkiakum County, WAWA4,87314–

12Spokane County, WAWA558,34415–

13Clark County, WAWA532,11916–

14Grays Harbor County, WAWA78,14417–

15Snohomish County, WAWA870,65619–

16Whatcom County, WAWA236,39219–

17Pacific County, WAWA24,35719–

18Clallam County, WAWA78,20219–

19Mason County, WAWA71,16519–

20Stevens County, WAWA49,66820–

21Skagit County, WAWA132,97520–

22Whitman County, WAWA48,51221–

23Thurston County, WAWA304,26122–

24Klickitat County, WAWA24,33124–

25Island County, WAWA85,65724–

26Chelan County, WAWA81,94124–

27Benton County, WAWA221,72226–

28Kitsap County, WAWA283,37427–

29Columbia County, WAWA4,14128–

30Douglas County, WAWA46,47328–

31Walla Walla County, WAWA62,36129–

32Pierce County, WAWA946,28837–

33King County, WAWA2,344,93937–

34Ferry County, WAWA7,51740–

35Okanogan County, WAWA45,23042–

36Grant County, WAWA105,72742–

37Yakima County, WAWA259,18556–

38Adams County, WAWA21,48857–

39Franklin County, WAWA102,61263–

SHOWING 1–39 OF 39

Download CSV (full list, 39 rows)How this score is calculated

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS