Jefferson County, Idaho
Jefferson County, Idaho, had an estimated population of 35,297 in 2025 across 2,833 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Idaho's counties and nationally.
- Population
- 35,297
- 2025 estimate
- Area
- 2,833 km²
- Density
- 12
- per km²
- Median income
- $86,679
- household, ACS 2024
- Median age
- 32.8
- years, ACS 2024
How Idaho's counties spread
Amenities & Infrastructure
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| Households with Broadband2024 | 95.0% | 3 / 44 | 65 / 3,144 |
| Median Gross Rent2024 | $1,138 | 7 / 44 | 642 / 3,137 |
| Median Home Value2024 | $408,400 | 11 / 44 | 273 / 3,139 |
| Owner-Occupied Homes2024 | 83.0% | 5 / 44 | 249 / 3,144 |
| Vacant Homes2024 | 5.4% | 37 / 44 | 2,913 / 3,144 |
Demography
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| Aged 65 and Over2024 | 11.9% | 43 / 44 | 3,059 / 3,144 |
| American Indian & Alaska Native2024 | 0.2% | 34 / 44 | 1,145 / 3,144 |
| Asian, non-Hispanic2024 | 0.1% | 30 / 44 | 2,631 / 3,144 |
| Average Household Size2024people | 3.2 | 2 / 44 | 43 / 3,144 |
| Black, non-Hispanic2024 | 0.0% | 38 / 44 | 3,009 / 3,144 |
| Foreign-Born2024 | 4.2% | 23 / 44 | 1,144 / 3,144 |
| Hispanic or Latino2024 | 11.0% | 20 / 44 | 794 / 3,144 |
| Median Age2024years | 32.8 | 41 / 44 | 3,005 / 3,144 |
| Sex Ratio2024per 1,000 males | 954 | 25 / 44 | 2,431 / 3,144 |
| Speak a Language Other Than English2024 | 11.6% | 16 / 44 | 784 / 3,144 |
| Under 182024 | 32.3% | 1 / 44 | 30 / 3,144 |
| Veterans2024 | 5.2% | 39 / 44 | 2,680 / 3,144 |
| White, non-Hispanic2024 | 85.7% | 14 / 44 | 1,202 / 3,144 |
Economy
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| Below Poverty Line2024 | 9.7% | 34 / 44 | 2,411 / 3,144 |
| Households on SNAP2024 | 7.5% | 25 / 44 | 2,418 / 3,144 |
| Income Inequality2024index | 0.375 | 41 / 44 | 3,103 / 3,144 |
| Median Household Income2024 | $86,679 | 4 / 44 | 384 / 3,143 |
| Per Capita Income2024 | $31,834 | 32 / 44 | 2,127 / 3,144 |
| Unemployment Rate2024 | 2.7% | 29 / 44 | 2,587 / 3,144 |
Education
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| Bachelor's Degree or Higher2024 | 27.4% | 14 / 44 | 944 / 3,144 |
| High School or Higher2024 | 93.3% | 11 / 44 | 679 / 3,144 |
Health Coverage
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| No Health Insurance2024 | 7.8% | 34 / 44 | 1,569 / 3,144 |
| With a Disability2024 | 12.8% | 38 / 44 | 2,477 / 3,144 |
Population & Density
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| Population2025 | 35,297 | 12 / 44 | 1,306 / 3,144 |
| Population Density2025/km² | 12 | 13 / 44 | 1,858 / 3,144 |
Work & Commute
| Indicator | Value | In Idaho | In the US |
|---|---|---|---|
| Commute by Public Transit2024 | 2.2% | 2 / 44 | 153 / 3,144 |
| Households with No Vehicle2024 | 1.3% | 40 / 44 | 3,098 / 3,144 |
| Mean Commute Time2024minutes | 25.1 | 10 / 44 | 1,345 / 3,143 |
| Work from Home2024 | 7.6% | 36 / 44 | 1,881 / 3,144 |
Other counties of Idaho
- Ada County
- Adams County
- Bannock County
- Bear Lake County
- Benewah County
- Bingham County
- Blaine County
- Boise County
- Bonner County
- Bonneville County
- Boundary County
- Butte County
- Camas County
- Canyon County
- Caribou County
- Cassia County
- Clark County
- Clearwater County
- Custer County
- Elmore County
- Franklin County
- Fremont County
- Gem County
- Gooding County
- Idaho County
- Jerome County
- Kootenai County
- Latah County
- Lemhi County
- Lewis County
- Lincoln County
- Madison County
- Minidoka County
- Nez Perce County
- Oneida County
- Owyhee County
- Payette County
- Power County
- Shoshone County
- Teton County
- Twin Falls County
- Valley County
- Washington County
Compare Jefferson County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.