RANKING · 2020 CENSUS · 22 SHOWN OF 22

Largest Costa Rican population, Washington counties · 2020

Washington counties ranked by the number of residents who are Costa Rican origin, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 22 counties in Washington that qualify, ranked against each other statewide.

Costa Rican Americans: full group profile →

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RELATEDLargest Mexican population Highest Mexican population share Largest Puerto Rican population Highest Puerto Rican population share Largest Cuban population Highest Cuban population share

YEAR2010 2020 2024

Largest Costa Rican population by state

RANKPLACESTATEPOPCOSTA RICAN POPULATIONVS 2010

01King County, WAWA2,344,9391,145+75%

02Snohomish County, WAWA870,656397+210%

03Pierce County, WAWA946,288325+364%

04Whatcom County, WAWA236,392229–

05Clark County, WAWA532,119199−8%

06Walla Walla County, WAWA62,361140+6900%

07Skagit County, WAWA132,975124+6100%

08Spokane County, WAWA558,34488+26%

09Jefferson County, WAWA33,97073–

10Kitsap County, WAWA283,37448+4%

11Yakima County, WAWA259,18547+370%

12Thurston County, WAWA304,26143+231%

13Mason County, WAWA71,16535–

14Okanogan County, WAWA45,23018–

15Klickitat County, WAWA24,33114–

16Lewis County, WAWA88,06213–

17Benton County, WAWA221,72210−9%

18Chelan County, WAWA81,9418–

19Kittitas County, WAWA48,8036–

20Adams County, WAWA21,4885–

21Island County, WAWA85,6575−44%

22Whitman County, WAWA48,5125−44%

SHOWING 1–22 OF 22

Download CSV (full list, 22 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS