RANKING · 2024 ACS · 44 SHOWN OF 44

Highest Scotch-Irish population share, Idaho counties

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 44 counties in Idaho 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

01Clark County, IDID7832.4%–

02Lemhi County, IDID8,4742.1%–

03Idaho County, IDID17,8742.0%–

04Custer County, IDID4,6361.8%–

05Gem County, IDID21,7731.8%–

06Blaine County, IDID25,5171.8%–

07Shoshone County, IDID14,1301.5%–

08Latah County, IDID41,8421.3%–

09Lincoln County, IDID5,6031.3%–

10Bonner County, IDID54,4201.3%–

11Owyhee County, IDID12,6611.2%–

12Kootenai County, IDID191,8641.2%–

13Benewah County, IDID10,5081.2%–

14Camas County, IDID1,3161.2%–

15Bear Lake County, IDID6,7271.0%–

16Teton County, IDID13,2541.0%–

17Jefferson County, IDID35,2971.0%–

18Clearwater County, IDID9,1180.9%–

19Washington County, IDID11,5830.9%–

20Boise County, IDID8,5450.9%–

21Ada County, IDID546,1410.9%–

22Bannock County, IDID91,5910.9%–

23Jerome County, IDID26,3620.8%–

24Bonneville County, IDID135,7710.7%–

25Elmore County, IDID29,4650.7%–

26Adams County, IDID5,0130.7%–

27Lewis County, IDID3,7040.7%–

28Canyon County, IDID275,1230.7%–

29Boundary County, IDID13,9970.6%–

30Fremont County, IDID14,2080.6%–

31Gooding County, IDID16,4460.6%–

32Cassia County, IDID26,3970.5%–

33Bingham County, IDID51,1530.5%–

34Twin Falls County, IDID97,5390.5%–

35Minidoka County, IDID22,9110.5%–

36Nez Perce County, IDID42,9050.5%–

37Valley County, IDID12,8310.5%–

38Payette County, IDID27,8240.4%–

39Caribou County, IDID7,2520.4%–

40Madison County, IDID55,1720.3%–

41Franklin County, IDID15,8890.3%–

42Butte County, IDID2,7830.2%–

43Oneida County, IDID5,0850.2%–

44Power County, IDID8,2460.0%–

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