RANKING · 2020 CENSUS · 43 SHOWN OF 43

Highest Scotch-Irish population share, Idaho counties · 2020

Idaho 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 43 counties in Idaho that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

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

01Boise County, IDID8,5452.3%–

02Bonner County, IDID54,4202.3%–

03Adams County, IDID5,0131.8%–

04Clearwater County, IDID9,1181.8%–

05Clark County, IDID7831.7%–

06Lewis County, IDID3,7041.5%–

07Boundary County, IDID13,9971.5%–

08Kootenai County, IDID191,8641.5%–

09Latah County, IDID41,8421.5%–

10Washington County, IDID11,5831.5%–

11Shoshone County, IDID14,1301.4%–

12Valley County, IDID12,8311.3%–

13Blaine County, IDID25,5171.2%–

14Idaho County, IDID17,8741.1%–

15Gem County, IDID21,7731.1%–

16Benewah County, IDID10,5081.1%–

17Bannock County, IDID91,5911.0%–

18Elmore County, IDID29,4651.0%–

19Lincoln County, IDID5,6031.0%–

20Minidoka County, IDID22,9110.9%–

21Bonneville County, IDID135,7710.9%–

22Custer County, IDID4,6360.9%–

23Payette County, IDID27,8240.9%–

24Jefferson County, IDID35,2970.9%–

25Ada County, IDID546,1410.9%–

26Nez Perce County, IDID42,9050.9%–

27Power County, IDID8,2460.9%–

28Butte County, IDID2,7830.8%–

29Madison County, IDID55,1720.8%–

30Teton County, IDID13,2540.8%–

31Canyon County, IDID275,1230.7%–

32Jerome County, IDID26,3620.7%–

33Fremont County, IDID14,2080.7%–

34Bear Lake County, IDID6,7270.6%–

35Twin Falls County, IDID97,5390.6%–

36Gooding County, IDID16,4460.5%–

37Owyhee County, IDID12,6610.5%–

38Caribou County, IDID7,2520.5%–

39Cassia County, IDID26,3970.5%–

40Franklin County, IDID15,8890.4%–

41Bingham County, IDID51,1530.4%–

42Camas County, IDID1,3160.4%–

43Lemhi County, IDID8,4740.2%–

SHOWING 1–43 OF 43

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