Data / Rankings / Foreign-born population share / Counties in Idaho

Counties in Idaho by foreign-born share of the population

Clark County had the highest foreign-born share of the population of 44 counties in 2021, at 23.8%. Custer County had the lowest, at 0.6%. The median was 4.2% and the figure for Idaho was 5.8%. Source: the U.S. Census Bureau.

Highest23.8Clark County
Lowest0.6Custer County
Median4.244 counties
Idaho5.8History

All counties, 2021

CSVChart (SVG)

Clark CountyClark County: 23.8 %23.8Jerome CountyJerome County: 17.6 %17.6Blaine CountyBlaine County: 16.8 %16.8Lincoln CountyLincoln County: 16.2 %16.2Power CountyPower County: 14.2 %14.2Minidoka CountyMinidoka County: 14.1 %14.1Gooding CountyGooding County: 12.3 %12.3Cassia CountyCassia County: 10.1 %10.1Elmore CountyElmore County: 10 %10Teton CountyTeton County: 9.2 %9.2Owyhee CountyOwyhee County: 8.8 %8.8Twin Falls CountyTwin Falls County: 8.5 %8.5Canyon CountyCanyon County: 8.4 %8.4Payette CountyPayette County: 6.7 %6.7Washington CountyWashington County: 6.6 %6.6Fremont CountyFremont County: 6 %6Ada CountyAda County: 5.7 %5.7Bingham CountyBingham County: 4.7 %4.7Boundary CountyBoundary County: 4.6 %4.6Caribou CountyCaribou County: 4.4 %4.4Latah CountyLatah County: 4.3 %4.3Bonneville CountyBonneville County: 4.3 %4.3Boise CountyBoise County: 4.2 %4.2Jefferson CountyJefferson County: 3.9 %3.9Gem CountyGem County: 3.8 %3.8Madison CountyMadison County: 3.8 %3.8Butte CountyButte County: 3.4 %3.4Bannock CountyBannock County: 3.1 %3.1Oneida CountyOneida County: 2.9 %2.9Franklin CountyFranklin County: 2.9 %2.9Bear Lake CountyBear Lake County: 2.8 %2.8Camas CountyCamas County: 2.8 %2.8Clearwater CountyClearwater County: 2.5 %2.5Kootenai CountyKootenai County: 2.3 %2.3Bonner CountyBonner County: 1.9 %1.9Lemhi CountyLemhi County: 1.8 %1.8Nez Perce CountyNez Perce County: 1.7 %1.7Lewis CountyLewis County: 1.6 %1.6Idaho CountyIdaho County: 1.5 %1.5Shoshone CountyShoshone County: 1.2 %1.2Adams CountyAdams County: 1.1 %1.1Benewah CountyBenewah County: 1.1 %1.1Valley CountyValley County: 0.9 %0.9Custer CountyCuster County: 0.6 %0.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1Clark County23.8
2Jerome County17.6
3Blaine County16.8
4Lincoln County16.2
5Power County14.2
6Minidoka County14.1
7Gooding County12.3
8Cassia County10.1
9Elmore County10
10Teton County9.2
11Owyhee County8.8
12Twin Falls County8.5
13Canyon County8.4
14Payette County6.7
15Washington County6.6
16Fremont County6
17Ada County5.7
18Bingham County4.7
19Boundary County4.6
20Caribou County4.4
21Latah County4.3
22Bonneville County4.3
23Boise County4.2
24Jefferson County3.9
25Gem County3.8
26Madison County3.8
27Butte County3.4
28Bannock County3.1
29Oneida County2.9
30Franklin County2.9
31Bear Lake County2.8
31Camas County2.8
33Clearwater County2.5
34Kootenai County2.3
35Bonner County1.9
36Lemhi County1.8
37Nez Perce County1.7
38Lewis County1.6
39Idaho County1.5
40Shoshone County1.2
41Adams County1.1
42Benewah County1.1
43Valley County0.9
44Custer County0.6

Other periods

About this ranking

People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Based on place of birth, not nationality: a naturalized citizen counts as foreign born, and people born in Puerto Rico, the US island areas or abroad to American parents count as native. Not comparable with foreign_population_share, which counts foreign nationals in Spain and the EU. Calculated from counts in ACS table B05002, which are stored as inputs.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b05002.dat. Retrieved 2026-10-09.

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Rank Counties in Idaho by foreign-born share of the population using official data, and cite the source.
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Questions

Which county has the highest foreign-born share of the population?

Clark County, with 23.8% in 2021, according to the U.S. Census Bureau.

Which county has the lowest foreign-born share of the population?

Custer County, with 0.6% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Foreign-born population share: other rankings

Counties in Idaho: more rankings