Ranking of Idaho Counties By Population with Scotch Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 16.83K people in Idaho with Scotch Irish ancestry. Among all Idaho counties, Ada County had the highest population with Scotch Irish ancestry (4.26K), followed by Kootenai County (2.43K), and Canyon County (1.36K).

The chart and table below shows the top 10 counties with high number of people with Scotch 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 Scotch Irish Ancestry in 2021
Ada County
Kootenai County
Canyon County
Bonneville County
Bannock County
Bonner County
Latah County
Madison County
Twin Falls County
Nez Perce County
Ranking of Idaho Counties By Population with Scotch Irish Ancestry in 2021
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Rank County Population
1 Ada County 4261
2 Kootenai County 2428
3 Canyon County 1355
4 Bonneville County 1183
5 Bannock County 917
6 Bonner County 806
7 Latah County 638
8 Madison County 461
9 Twin Falls County 403
10 Nez Perce County 292
11 Blaine County 289
12 Jefferson County 266
13 Elmore County 259
14 Shoshone County 245
15 Gem County 230
16 Payette County 208
17 Idaho County 200
18 Minidoka County 190
19 Teton County 179
20 Boise County 172
20 Jerome County 172
21 Washington County 161
22 Clearwater County 152
23 Valley County 140
24 Bingham County 138
25 Boundary County 135
26 Lemhi County 127
27 Benewah County 113
28 Fremont County 100
29 Gooding County 96
30 Cassia County 78
31 Adams County 71
32 Lincoln County 58
33 Franklin County 55
34 Lewis County 48
35 Owyhee County 45
36 Bear Lake County 42
36 Caribou County 42
36 Custer County 42
37 Butte County 15
38 Clark County 9
39 Power County 7
40 Camas County 3