Demographics Table
Demographic Data Report for Idaho by County
Population: Age 40 and over
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 40 And Over)
|
Rank within US (of 3143 counties) 
|
|---|---|---|---|---|
| United States | N/A | 48.5 | 162,458,898 | N/A |
| Idaho | N/A | 46.5 | 899,485 | 44 of 52 |
| Custer County | Rural | 73.7 | 3,295 | 4 |
| Boise County | Urban | 64.6 | 5,341 | 85 |
| Adams County | Rural | 63.8 | 3,027 | 108 |
| Clearwater County | Rural | 63.4 | 5,710 | 119 |
| Lemhi County | Rural | 63.0 | 5,198 | 135 |
| Bonner County | Rural | 60.1 | 30,676 | 258 |
| Idaho County | Rural | 59.2 | 10,328 | 334 |
| Lewis County | Rural | 59.1 | 2,175 | 344 |
| Valley County | Rural | 58.0 | 7,182 | 446 |
| Benewah County | Rural | 56.2 | 5,701 | 652 |
| Blaine County | Rural | 56.0 | 13,982 | 682 |
| Shoshone County | Rural | 55.7 | 7,682 | 738 |
| Boundary County | Rural | 55.1 | 7,258 | 836 |
| Washington County | Rural | 55.1 | 6,138 | 836 |
| Gem County | Urban | 54.8 | 11,295 | 888 |
| Kootenai County | Urban | 51.6 | 93,932 | 1,641 |
| Nez Perce County | Urban | 51.4 | 21,956 | 1,691 |
| Butte County | Urban | 51.2 | 1,375 | 1,740 |
| Oneida County | Rural | 51.1 | 2,437 | 1,772 |
| Bear Lake County | Rural | 50.7 | 3,371 | 1,858 |
| Fremont County | Rural | 50.1 | 6,981 | 2,012 |
| Payette County | Rural | 49.3 | 13,201 | 2,185 |
| Owyhee County | Urban | 49.2 | 6,151 | 2,214 |
| Teton County | Rural | 49.2 | 6,112 | 2,214 |
| Gooding County | Rural | 48.2 | 7,683 | 2,389 |
| Camas County | Rural | 48.0 | 539 | 2,419 |
| Ada County | Urban | 47.7 | 247,573 | 2,458 |
| Caribou County | Rural | 47.2 | 3,384 | 2,527 |
| Lincoln County | Rural | 46.3 | 2,481 | 2,640 |
| Twin Falls County | Urban | 44.8 | 42,031 | 2,781 |
| Minidoka County | Rural | 44.4 | 9,855 | 2,812 |
| Bannock County | Urban | 43.9 | 39,303 | 2,841 |
| Canyon County | Urban | 43.5 | 109,096 | 2,881 |
| Bingham County | Rural | 43.4 | 21,571 | 2,886 |
| Power County | Rural | 43.1 | 3,503 | 2,900 |
| Franklin County | Urban | 42.9 | 6,464 | 2,911 |
| Jerome County | Urban | 42.8 | 10,777 | 2,914 |
| Cassia County | Rural | 41.5 | 10,564 | 2,962 |
| Bonneville County | Urban | 41.0 | 53,142 | 2,988 |
| Jefferson County | Urban | 40.4 | 13,404 | 3,014 |
| Clark County | Rural | 40.3 | 342 | 3,021 |
| Elmore County | Rural | 40.3 | 11,829 | 3,021 |
| Latah County | Rural | 38.8 | 15,914 | 3,064 |
| Madison County | Rural | 17.4 | 9,526 | 3,142 |
Notes:
Created by statecancerprofiles.cancer.gov on 03/30/2026 8:34 pm.
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 40 and over, see the dictionary.
Data for United States does not include Puerto Rico.