RANKING · 2020 CENSUS · 44 SHOWN OF 44

Largest Welsh population, Idaho counties · 2020

Idaho counties ranked by the number of residents who are Welsh ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 44 counties in Idaho that qualify, ranked against each other statewide. The median across all 44 is 141.

Welsh Americans: full group profile →

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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

RANKPLACESTATEPOPWELSH POPULATIONVS 2010

01Ada County, IDID546,1416,442+8%

02Kootenai County, IDID191,8642,745+103%

03Bonneville County, IDID135,7712,329+28%

04Bannock County, IDID91,5912,135+7%

05Canyon County, IDID275,1231,453−22%

06Twin Falls County, IDID97,5391,042+104%

07Madison County, IDID55,172855−25%

08Jefferson County, IDID35,297705+77%

09Oneida County, IDID5,085647+1%

10Bingham County, IDID51,153569−13%

11Bonner County, IDID54,420492+290%

12Nez Perce County, IDID42,905458−21%

13Franklin County, IDID15,889447+37%

14Cassia County, IDID26,397399+81%

15Valley County, IDID12,831315−8%

16Jerome County, IDID26,362308+49%

17Elmore County, IDID29,465287+45%

18Latah County, IDID41,842267−67%

19Payette County, IDID27,824197−25%

20Bear Lake County, IDID6,727172+81%

21Gem County, IDID21,773171−34%

22Fremont County, IDID14,208141−29%

23Blaine County, IDID25,517131−48%

24Idaho County, IDID17,874125−11%

25Shoshone County, IDID14,130116−52%

26Teton County, IDID13,254116+35%

27Lemhi County, IDID8,474115−34%

28Boise County, IDID8,545111+46%

29Clearwater County, IDID9,118109+30%

30Washington County, IDID11,583107+24%

31Owyhee County, IDID12,66189−31%

32Butte County, IDID2,78388−30%

33Minidoka County, IDID22,91186−29%

34Custer County, IDID4,63674−32%

35Caribou County, IDID7,25274−47%

36Gooding County, IDID16,44666−69%

37Benewah County, IDID10,50857−21%

38Lewis County, IDID3,70455+400%

39Adams County, IDID5,01350−52%

40Boundary County, IDID13,99745−68%

41Power County, IDID8,24639−78%

42Clark County, IDID78330+67%

43Lincoln County, IDID5,60324+14%

44Camas County, IDID1,3166+50%

SHOWING 1–44 OF 44

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS