Demographics Table
Demographic Data Report for Idaho by County
Population: Age 18-39
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 18-39)
|
Rank within US (of 3143 counties)
|
|---|---|---|---|---|
| Idaho | N/A | 29.4 | 568,594 | 20 of 52 |
| United States | N/A | 29.5 | 98,945,767 | N/A |
| Custer County | Rural | 12.3 | 552 | 3,139 |
| Adams County | Rural | 18.8 | 890 | 3,032 |
| Lewis County | Rural | 19.0 | 699 | 3,020 |
| Boise County | Urban | 20.0 | 1,658 | 2,964 |
| Lemhi County | Rural | 20.0 | 1,652 | 2,964 |
| Bonner County | Rural | 20.3 | 10,377 | 2,939 |
| Idaho County | Rural | 20.9 | 3,648 | 2,871 |
| Boundary County | Rural | 21.6 | 2,842 | 2,769 |
| Benewah County | Rural | 21.8 | 2,206 | 2,742 |
| Clearwater County | Rural | 21.8 | 1,961 | 2,742 |
| Bear Lake County | Rural | 21.9 | 1,459 | 2,723 |
| Oneida County | Rural | 21.9 | 1,042 | 2,723 |
| Washington County | Rural | 22.7 | 2,530 | 2,567 |
| Gem County | Urban | 23.3 | 4,796 | 2,400 |
| Valley County | Rural | 23.3 | 2,881 | 2,400 |
| Shoshone County | Rural | 23.5 | 3,246 | 2,338 |
| Butte County | Urban | 24.2 | 649 | 2,138 |
| Blaine County | Rural | 24.8 | 6,188 | 1,934 |
| Payette County | Rural | 25.2 | 6,744 | 1,789 |
| Gooding County | Rural | 25.4 | 4,044 | 1,712 |
| Camas County | Rural | 25.6 | 288 | 1,623 |
| Fremont County | Rural | 26.0 | 3,622 | 1,485 |
| Kootenai County | Urban | 26.0 | 47,408 | 1,485 |
| Caribou County | Rural | 26.3 | 1,887 | 1,375 |
| Owyhee County | Urban | 26.4 | 3,296 | 1,335 |
| Franklin County | Urban | 26.6 | 3,999 | 1,264 |
| Power County | Rural | 27.1 | 2,207 | 1,112 |
| Jefferson County | Urban | 27.2 | 9,026 | 1,081 |
| Minidoka County | Rural | 27.4 | 6,088 | 1,021 |
| Nez Perce County | Urban | 27.4 | 11,678 | 1,021 |
| Bingham County | Rural | 27.5 | 13,637 | 993 |
| Jerome County | Urban | 27.5 | 6,935 | 993 |
| Cassia County | Rural | 27.6 | 7,040 | 961 |
| Lincoln County | Rural | 27.7 | 1,484 | 935 |
| Teton County | Rural | 28.5 | 3,538 | 761 |
| Twin Falls County | Urban | 28.8 | 27,031 | 703 |
| Bonneville County | Urban | 29.2 | 37,778 | 615 |
| Canyon County | Urban | 29.8 | 74,656 | 513 |
| Ada County | Urban | 30.3 | 157,169 | 445 |
| Bannock County | Urban | 30.9 | 27,682 | 385 |
| Clark County | Rural | 31.2 | 265 | 357 |
| Elmore County | Rural | 35.4 | 10,391 | 141 |
| Latah County | Rural | 42.4 | 17,387 | 35 |
| Madison County | Rural | 62.3 | 34,038 | 2 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/22/2026 7:44 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 18-39, see the dictionary.
Data for United States does not include Puerto Rico.