Ranking of Idaho Counties By Population with Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 165.57K people in Idaho with Irish ancestry. Among all Idaho counties, Ada County had the highest population with Irish ancestry (55.49K), followed by Kootenai County (19.79K), and Canyon County (17.70K).

The chart and table below shows the top 10 counties with high number of people with Irish ancestry.

You can see similar information for other states and for other ancestry groups in Idaho.

Data Source: US Census Bureau.
Ranking of Idaho Counties By Population with Irish Ancestry in 2021
Ada County
Kootenai County
Canyon County
Bonneville County
Bannock County
Twin Falls County
Bonner County
Latah County
Nez Perce County
Elmore County
Ranking of Idaho Counties By Population with Irish Ancestry in 2021
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Rank County Population
1 Ada County 55491
2 Kootenai County 19790
3 Canyon County 17701
4 Bonneville County 7817
5 Bannock County 7203
6 Twin Falls County 7191
7 Bonner County 6116
8 Latah County 4657
9 Nez Perce County 3723
10 Elmore County 2760
11 Idaho County 2071
12 Madison County 1957
13 Bingham County 1798
14 Payette County 1775
15 Shoshone County 1748
16 Jerome County 1670
17 Blaine County 1536
18 Jefferson County 1502
19 Gem County 1483
20 Valley County 1403
21 Washington County 1332
22 Boundary County 1179
22 Clearwater County 1179
23 Fremont County 1172
24 Gooding County 1161
25 Benewah County 1099
26 Minidoka County 1038
27 Lemhi County 1022
28 Teton County 938
29 Cassia County 835
30 Boise County 833
31 Owyhee County 696
32 Adams County 613
33 Power County 607
34 Custer County 510
35 Lewis County 432
36 Franklin County 330
37 Bear Lake County 302
38 Lincoln County 300
39 Caribou County 261
40 Oneida County 204
41 Butte County 74
42 Clark County 33
43 Camas County 31