# Counties in Idaho by population, 2025

All 44 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
- Source: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program) (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/population/idaho-counties
- CSV: https://invokely.ai/download/rankings/population/idaho-counties.csv

| Rank | Place | persons |
|---:|---|---:|
| 1 | Ada County | 546,141 |
| 2 | Canyon County | 275,123 |
| 3 | Kootenai County | 191,864 |
| 4 | Bonneville County | 135,771 |
| 5 | Twin Falls County | 97,539 |
| 6 | Bannock County | 91,591 |
| 7 | Madison County | 55,172 |
| 8 | Bonner County | 54,420 |
| 9 | Bingham County | 51,153 |
| 10 | Nez Perce County | 42,905 |
| 11 | Latah County | 41,842 |
| 12 | Jefferson County | 35,297 |
| 13 | Elmore County | 29,465 |
| 14 | Payette County | 27,824 |
| 15 | Cassia County | 26,397 |
| 16 | Jerome County | 26,362 |
| 17 | Blaine County | 25,517 |
| 18 | Minidoka County | 22,911 |
| 19 | Gem County | 21,773 |
| 20 | Idaho County | 17,874 |
| 21 | Gooding County | 16,446 |
| 22 | Franklin County | 15,889 |
| 23 | Fremont County | 14,208 |
| 24 | Shoshone County | 14,130 |
| 25 | Boundary County | 13,997 |
| 26 | Teton County | 13,254 |
| 27 | Valley County | 12,831 |
| 28 | Owyhee County | 12,661 |
| 29 | Washington County | 11,583 |
| 30 | Benewah County | 10,508 |
| 31 | Clearwater County | 9,118 |
| 32 | Boise County | 8,545 |
| 33 | Lemhi County | 8,474 |
| 34 | Power County | 8,246 |
| 35 | Caribou County | 7,252 |
| 36 | Bear Lake County | 6,727 |
| 37 | Lincoln County | 5,603 |
| 38 | Oneida County | 5,085 |
| 39 | Adams County | 5,013 |
| 40 | Custer County | 4,636 |
| 41 | Lewis County | 3,704 |
| 42 | Butte County | 2,783 |
| 43 | Camas County | 1,316 |
| 44 | Clark County | 783 |