RANKING · 2020 CENSUS · 39 SHOWN OF 39

Highest Scotch-Irish population share, Washington counties · 2020

Washington counties ranked by the share of all residents who are Scotch-Irish ancestry (2023 American Community Survey). A concentration measure: Scotch-Irish residents as a percentage of total population. This list covers the 39 counties in Washington that qualify, ranked against each other statewide.

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RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2000

01San Juan County, WAWA18,5771.9%–

02Mason County, WAWA71,1651.9%–

03Klickitat County, WAWA24,3311.8%–

04Ferry County, WAWA7,5171.8%–

05Wahkiakum County, WAWA4,8731.8%–

06Jefferson County, WAWA33,9701.5%–

07Kitsap County, WAWA283,3741.5%–

08Columbia County, WAWA4,1411.5%–

09Pacific County, WAWA24,3571.5%–

10Skagit County, WAWA132,9751.4%–

11Stevens County, WAWA49,6681.4%–

12Clallam County, WAWA78,2021.4%–

13Walla Walla County, WAWA62,3611.4%–

14Pend Oreille County, WAWA14,4571.4%–

15Spokane County, WAWA558,3441.3%–

16Whatcom County, WAWA236,3921.3%–

17Island County, WAWA85,6571.3%–

18Clark County, WAWA532,1191.3%–

19Snohomish County, WAWA870,6561.2%–

20Lewis County, WAWA88,0621.2%–

21Thurston County, WAWA304,2611.2%–

22Garfield County, WAWA2,4161.2%–

23Okanogan County, WAWA45,2301.1%–

24Benton County, WAWA221,7221.1%–

25Chelan County, WAWA81,9411.1%–

26Kittitas County, WAWA48,8031.1%–

27Cowlitz County, WAWA114,8851.1%–

28King County, WAWA2,344,9391.1%–

29Grays Harbor County, WAWA78,1441.0%–

30Pierce County, WAWA946,2880.9%–

31Whitman County, WAWA48,5120.8%–

32Yakima County, WAWA259,1850.7%–

33Lincoln County, WAWA11,9820.7%–

34Skamania County, WAWA12,6690.6%–

35Grant County, WAWA105,7270.6%–

36Douglas County, WAWA46,4730.6%–

37Adams County, WAWA21,4880.6%–

38Asotin County, WAWA22,5450.5%–

39Franklin County, WAWA102,6120.4%–

SHOWING 1–39 OF 39

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES