RANKING · 2024 ACS · 20 SHOWN OF 20

Highest Costa Rican population share, Washington counties

Washington counties ranked by the share of all residents who are Costa Rican origin (2024 American Community Survey). A concentration measure: Costa Rican residents as a percentage of total population. This list covers the 20 counties in Washington that qualify, ranked against each other statewide. The median across all 20 is 0.0%. Biggest climber in the top 100 since 2020: Whitman County, WA, up 18 places to #2.

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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

Highest Costa Rican population share by state

RANKPLACESTATEPOPCOSTA RICAN SHAREVS 2010

01▲1Jefferson County, WAWA33,9700.3%–

02▲18Whitman County, WAWA48,5120.1%+0.1 pts

03▲1Skagit County, WAWA132,9750.1%+0.1 pts

04▲18Benton County, WAWA221,7220.1%+0.1 pts

05▲1Mason County, WAWA71,1650.1%–

06▲7Yakima County, WAWA259,1850.1%+0.1 pts

07▲4Pierce County, WAWA946,2880.1%+0.1 pts

08▼5Whatcom County, WAWA236,3920.1%–

09Clallam County, WAWA78,2020.0%0.0 pts

10▼2Snohomish County, WAWA870,6560.0%0.0 pts

11▲3Kitsap County, WAWA283,3740.0%0.0 pts

12▼2Clark County, WAWA532,1190.0%0.0 pts

13▼6King County, WAWA2,344,9390.0%0.0 pts

14▲1Spokane County, WAWA558,3440.0%0.0 pts

15▼14Walla Walla County, WAWA62,3610.0%0.0 pts

16▲2Kittitas County, WAWA48,8030.0%–

17▲2Chelan County, WAWA81,9410.0%–

18▼1Thurston County, WAWA304,2610.0%0.0 pts

19Franklin County, WAWA102,6120.0%–

20▲1Island County, WAWA85,6570.0%0.0 pts

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES