Data / Rankings / Foreign-born population share / Counties in Washington

Counties in Washington by foreign-born share of the population

King County had the highest foreign-born share of the population of 39 counties in 2021, at 24.2%. Ferry County had the lowest, at 1.5%. The median was 7.4% and the figure for Washington was 14.7%. Source: the U.S. Census Bureau.

Highest24.2King County
Lowest1.5Ferry County
Median7.439 counties
Washington14.7History

All counties, 2021

CSVChart (SVG)

King CountyKing County: 24.2 %24.2Adams CountyAdams County: 23.9 %23.9Franklin CountyFranklin County: 22.2 %22.2Yakima CountyYakima County: 18.7 %18.7Snohomish CountySnohomish County: 17.2 %17.2Grant CountyGrant County: 16.6 %16.6Douglas CountyDouglas County: 15.4 %15.4Chelan CountyChelan County: 13.6 %13.6Benton CountyBenton County: 11 %11Clark CountyClark County: 10.8 %10.8Whitman CountyWhitman County: 10.6 %10.6Pierce CountyPierce County: 10.2 %10.2Okanogan CountyOkanogan County: 9.7 %9.7Whatcom CountyWhatcom County: 9.7 %9.7Skagit CountySkagit County: 9.5 %9.5Klickitat CountyKlickitat County: 9.3 %9.3Walla Walla CountyWalla Walla County: 9.2 %9.2Thurston CountyThurston County: 8.4 %8.4San Juan CountySan Juan County: 7.6 %7.6Island CountyIsland County: 7.4 %7.4Pacific CountyPacific County: 6.9 %6.9Kitsap CountyKitsap County: 6.8 %6.8Mason CountyMason County: 6.1 %6.1Spokane CountySpokane County: 5.3 %5.3Clallam CountyClallam County: 5.3 %5.3Lewis CountyLewis County: 5 %5Grays Harbor CountyGrays Harbor County: 4.8 %4.8Wahkiakum CountyWahkiakum County: 4.7 %4.7Jefferson CountyJefferson County: 4.7 %4.7Kittitas CountyKittitas County: 4.5 %4.5Cowlitz CountyCowlitz County: 4 %4Columbia CountyColumbia County: 3.6 %3.6Skamania CountySkamania County: 3.4 %3.4Asotin CountyAsotin County: 2.9 %2.9Pend Oreille CountyPend Oreille County: 2.7 %2.7Stevens CountyStevens County: 2.4 %2.4Garfield CountyGarfield County: 2.2 %2.2Lincoln CountyLincoln County: 1.6 %1.6Ferry CountyFerry County: 1.5 %1.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1King County24.2
2Adams County23.9
3Franklin County22.2
4Yakima County18.7
5Snohomish County17.2
6Grant County16.6
7Douglas County15.4
8Chelan County13.6
9Benton County11
10Clark County10.8
11Whitman County10.6
12Pierce County10.2
13Okanogan County9.7
14Whatcom County9.7
15Skagit County9.5
16Klickitat County9.3
17Walla Walla County9.2
18Thurston County8.4
19San Juan County7.6
20Island County7.4
21Pacific County6.9
22Kitsap County6.8
23Mason County6.1
24Spokane County5.3
25Clallam County5.3
26Lewis County5
27Grays Harbor County4.8
28Wahkiakum County4.7
29Jefferson County4.7
30Kittitas County4.5
31Cowlitz County4
32Columbia County3.6
33Skamania County3.4
34Asotin County2.9
35Pend Oreille County2.7
36Stevens County2.4
37Garfield County2.2
38Lincoln County1.6
39Ferry County1.5

Other periods

About this ranking

People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Based on place of birth, not nationality: a naturalized citizen counts as foreign born, and people born in Puerto Rico, the US island areas or abroad to American parents count as native. Not comparable with foreign_population_share, which counts foreign nationals in Spain and the EU. Calculated from counts in ACS table B05002, which are stored as inputs.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b05002.dat. Retrieved 2026-10-09.

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Questions

Which county has the highest foreign-born share of the population?

King County, with 24.2% in 2021, according to the U.S. Census Bureau.

Which county has the lowest foreign-born share of the population?

Ferry County, with 1.5% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Foreign-born population share: other rankings

Counties in Washington: more rankings