RANKING · 1990 CENSUS · 39 SHOWN OF 39

Most racially diverse, Washington counties · 1990

Washington counties ranked by the CensusEasy Diversity Score (0 to 100), the chance two random residents are of a different 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 · Least 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 –

01Franklin County, WAWA102,61263–

02Adams County, WAWA21,48857–

03Yakima County, WAWA259,18556–

04Grant County, WAWA105,72742–

05Okanogan County, WAWA45,23042–

06Ferry County, WAWA7,51740–

07King County, WAWA2,344,93937–

08Pierce County, WAWA946,28837–

09Walla Walla County, WAWA62,36129–

10Douglas County, WAWA46,47328–

11Columbia County, WAWA4,14128–

12Kitsap County, WAWA283,37427–

13Benton County, WAWA221,72226–

14Chelan County, WAWA81,94124–

15Island County, WAWA85,65724–

16Klickitat County, WAWA24,33124–

17Thurston County, WAWA304,26122–

18Whitman County, WAWA48,51221–

19Skagit County, WAWA132,97520–

20Stevens County, WAWA49,66820–

21Mason County, WAWA71,16519–

22Clallam County, WAWA78,20219–

23Pacific County, WAWA24,35719–

24Whatcom County, WAWA236,39219–

25Snohomish County, WAWA870,65619–

26Grays Harbor County, WAWA78,14417–

27Clark County, WAWA532,11916–

28Spokane County, WAWA558,34415–

29Wahkiakum County, WAWA4,87314–

30Cowlitz County, WAWA114,88514–

31Jefferson County, WAWA33,97014–

32Skamania County, WAWA12,66913–

33Kittitas County, WAWA48,80313–

34Lewis County, WAWA88,06211–

35Pend Oreille County, WAWA14,4578–

36San Juan County, WAWA18,5778–

37Asotin County, WAWA22,5458–

38Lincoln County, WAWA11,9827–

39Garfield County, WAWA2,4162–

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