Demographics Table
Demographic Data Report for Idaho by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
County
|
2023 Rural-Urban Continuum Codes Φ
|
Value (Percent)
|
People (Age Under 18)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| United States | N/A | 22.0 | 73,517,834 | N/A |
| Idaho | N/A | 24.1 | 466,183 | 5 of 52 |
| Custer County | Rural | 13.9 | 623 | 3,093 |
| Clearwater County | Rural | 14.9 | 1,341 | 3,044 |
| Boise County | Urban | 15.4 | 1,274 | 3,017 |
| Lemhi County | Rural | 17.0 | 1,399 | 2,883 |
| Adams County | Rural | 17.4 | 827 | 2,833 |
| Valley County | Rural | 18.8 | 2,326 | 2,580 |
| Latah County | Rural | 18.9 | 7,748 | 2,564 |
| Blaine County | Rural | 19.2 | 4,781 | 2,493 |
| Bonner County | Rural | 19.6 | 9,996 | 2,372 |
| Idaho County | Rural | 19.8 | 3,456 | 2,323 |
| Madison County | Rural | 20.2 | 11,054 | 2,193 |
| Shoshone County | Rural | 20.7 | 2,857 | 2,021 |
| Nez Perce County | Urban | 21.2 | 9,063 | 1,816 |
| Gem County | Urban | 21.9 | 4,523 | 1,525 |
| Lewis County | Rural | 21.9 | 808 | 1,525 |
| Ada County | Urban | 22.0 | 114,193 | 1,478 |
| Benewah County | Rural | 22.0 | 2,235 | 1,478 |
| Washington County | Rural | 22.2 | 2,474 | 1,395 |
| Kootenai County | Urban | 22.3 | 40,656 | 1,356 |
| Teton County | Rural | 22.3 | 2,775 | 1,356 |
| Boundary County | Rural | 23.3 | 3,072 | 926 |
| Fremont County | Rural | 24.0 | 3,340 | 690 |
| Elmore County | Rural | 24.2 | 7,101 | 635 |
| Owyhee County | Urban | 24.4 | 3,056 | 573 |
| Butte County | Urban | 24.6 | 660 | 514 |
| Bannock County | Urban | 25.1 | 22,469 | 410 |
| Payette County | Rural | 25.5 | 6,826 | 321 |
| Lincoln County | Rural | 26.0 | 1,393 | 255 |
| Twin Falls County | Urban | 26.3 | 24,672 | 233 |
| Camas County | Rural | 26.4 | 297 | 221 |
| Caribou County | Rural | 26.4 | 1,891 | 221 |
| Gooding County | Rural | 26.4 | 4,204 | 221 |
| Canyon County | Urban | 26.7 | 67,038 | 196 |
| Oneida County | Rural | 27.0 | 1,289 | 175 |
| Bear Lake County | Rural | 27.4 | 1,820 | 156 |
| Minidoka County | Rural | 28.2 | 6,265 | 126 |
| Clark County | Rural | 28.5 | 242 | 114 |
| Bingham County | Rural | 29.1 | 14,456 | 95 |
| Jerome County | Urban | 29.6 | 7,461 | 85 |
| Bonneville County | Urban | 29.8 | 38,603 | 78 |
| Power County | Rural | 29.8 | 2,423 | 78 |
| Franklin County | Urban | 30.5 | 4,593 | 60 |
| Cassia County | Rural | 30.9 | 7,879 | 50 |
| Jefferson County | Urban | 32.3 | 10,724 | 30 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/21/2026 10:34 am.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.
Data for United States does not include Puerto Rico.