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 (2024 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. The median across all 44 is 0.9%. Biggest climber in the top 100 since 2020: Lemhi County, ID, up 41 places to #2.

Scotch-Irish Americans: full group profile →

IdahoAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPSCOTCH-IRISH SHAREVS 2010

01▲4Clark County, IDID7832.4%+0.1 pts

02▲41Lemhi County, IDID8,4742.1%−0.2 pts

03▲11Idaho County, IDID17,8742.0%−0.9 pts

04▲18Custer County, IDID4,6361.8%0.0 pts

05▲10Gem County, IDID21,7731.8%−0.9 pts

06▲7Blaine County, IDID25,5171.8%−0.9 pts

07▲4Shoshone County, IDID14,1301.5%−1.2 pts

08▲1Latah County, IDID41,8421.3%−1.8 pts

09▲10Lincoln County, IDID5,6031.3%−0.9 pts

10▼8Bonner County, IDID54,4201.3%−2.2 pts

11▲26Owyhee County, IDID12,6611.2%+0.2 pts

12▼4Kootenai County, IDID191,8641.2%−1.6 pts

13▲3Benewah County, IDID10,5081.2%−0.9 pts

14▲28Camas County, IDID1,3161.2%−1.3 pts

15▲19Bear Lake County, IDID6,7271.0%+0.1 pts

16▲14Teton County, IDID13,2541.0%−1.7 pts

17▲7Jefferson County, IDID35,2971.0%+0.4 pts

18▼14Clearwater County, IDID9,1180.9%−2.6 pts

19▼9Washington County, IDID11,5830.9%−1.3 pts

20▼19Boise County, IDID8,5450.9%−1.1 pts

21▲4Ada County, IDID546,1410.9%−1.3 pts

22▼5Bannock County, IDID91,5910.9%−1.0 pts

23▲9Jerome County, IDID26,3620.8%−0.8 pts

24▼3Bonneville County, IDID135,7710.7%−0.7 pts

25▼7Elmore County, IDID29,4650.7%−0.5 pts

26▼23Adams County, IDID5,0130.7%−3.5 pts

27▼21Lewis County, IDID3,7040.7%−2.0 pts

28▲3Canyon County, IDID275,1230.7%−1.0 pts

29▼22Boundary County, IDID13,9970.6%−3.3 pts

30▲3Fremont County, IDID14,2080.6%−0.1 pts

31▲5Gooding County, IDID16,4460.6%−0.6 pts

32▲7Cassia County, IDID26,3970.5%−0.5 pts

33▲8Bingham County, IDID51,1530.5%−0.9 pts

34▲1Twin Falls County, IDID97,5390.5%−0.7 pts

35▼15Minidoka County, IDID22,9110.5%−1.3 pts

36▼10Nez Perce County, IDID42,9050.5%−2.0 pts

37▼25Valley County, IDID12,8310.5%−2.8 pts

38▼15Payette County, IDID27,8240.4%−1.5 pts

39▼1Caribou County, IDID7,2520.4%+0.2 pts

40▼11Madison County, IDID55,1720.3%−1.2 pts

41▼1Franklin County, IDID15,8890.3%−1.1 pts

42▼14Butte County, IDID2,7830.2%−4.1 pts

43Oneida County, IDID5,0850.2%−0.2 pts

44▼17Power County, IDID8,2460.0%−0.6 pts

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