Ranking of Idaho Counties By Percentage of Population with American Ancestry in 2021
Updated on April 16, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, there were 106.42K people in Idaho with American ancestry (5.87% of Idaho population). Among all Idaho counties, Boundary County had the highest percentage of its population with American ancestry (13.74%), followed by Clark County (13.35%), and Gem County (11.33%).
The chart and table below shows the top 10 counties with high percentage of its population having American ancestry.
You can see similar information for other states and for other ancestry groups in Idaho.
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Related Topics: Idaho ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census Bureau.
Ranking of Idaho Counties By Percentage of Population with American Ancestry in 2021
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| Rank | County | Percentage of Pop. (%) |
|---|---|---|
| 1 | Boundary County | 13.74 |
| 2 | Clark County | 13.35 |
| 3 | Gem County | 11.33 |
| 4 | Minidoka County | 11.13 |
| 5 | Cassia County | 9.87 |
| 6 | Caribou County | 9.74 |
| 7 | Bingham County | 9.06 |
| 8 | Franklin County | 8.81 |
| 9 | Butte County | 8.40 |
| 10 | Bonneville County | 8.36 |
| 11 | Jefferson County | 8.25 |
| 12 | Jerome County | 7.91 |
| 13 | Camas County | 7.85 |
| 14 | Adams County | 7.68 |
| 15 | Twin Falls County | 7.50 |
| 16 | Idaho County | 7.45 |
| 16 | Lincoln County | 7.45 |
| 17 | Bannock County | 7.12 |
| 18 | Power County | 6.85 |
| 19 | Oneida County | 6.65 |
| 20 | Payette County | 6.60 |
| 21 | Bonner County | 6.44 |
| 22 | Washington County | 6.43 |
| 23 | Blaine County | 5.82 |
| 24 | Lewis County | 5.65 |
| 25 | Madison County | 5.55 |
| 26 | Fremont County | 5.35 |
| 27 | Gooding County | 5.33 |
| 28 | Lemhi County | 5.21 |
| 29 | Canyon County | 5.15 |
| 29 | Nez Perce County | 5.15 |
| 30 | Elmore County | 5.04 |
| 31 | Clearwater County | 5.02 |
| 32 | Owyhee County | 4.92 |
| 33 | Boise County | 4.85 |
| 34 | Latah County | 4.73 |
| 35 | Benewah County | 4.55 |
| 36 | Valley County | 4.54 |
| 37 | Ada County | 4.47 |
| 38 | Bear Lake County | 4.33 |
| 39 | Shoshone County | 4.27 |
| 40 | Kootenai County | 4.03 |
| 41 | Teton County | 3.80 |
| 42 | Custer County | 2.20 |
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