Jerome County, Idaho Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Jerome County, ID Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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C
Health Below averageLess healthy than 85% of counties in Idaho
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C
Income Below average
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F
Education Well below averageLess educated than 88% of counties in Idaho
Source: Map AI Methodology
Population: density and quick facts
| Metric | Jerome County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Population | 25,173 | 1,929,983 | 337,468,954 |
| Population density (per sq mi) | 41.8 | 23.1 | 86.4 |
| Population growth (%/yr) | 1.28% | 2.12% | 0.59% |
| Median age | 32.7 | 38.7 | 37.3 |
| Households | 8,277 | 712,816 | 130,235,071 |
Population in Jerome County grew by 24.8% from 2009 to 2024, reaching 25,173 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Jerome County is Gen Z, aged 13–28, at 23.0% of residents. That is 0.2 points above Idaho as a whole.
- Gen Z 13–28 5,794 23.0% +0.2 pts
- Millennials 29–44 5,226 20.8% on par
- Gen X 45–60 4,541 18.0% -1.2 pts
- Boomers 61–79 3,561 14.1% -1.9 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Idaho, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 48.8% of the people living in Jerome County and men 51.2%.
- Women 48.8% Idaho 49.6%
- Men 51.2% Idaho 50.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Jerome County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Jerome County has a the economy index of C, which means it is somewhat prosperous.
| Metric | Jerome County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median household income | $71,652 | $78,141 | $80,455 |
| Income growth (%/yr) | 6.22% | 5.97% | 4.80% |
| Unemployment rate | 3.6% | 3.7% | 5.2% |
The median household income in Jerome County is about 8% lower than in Idaho.
Housing
| Metric | Jerome County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median home price | $275,000 | $394,140 | $248,835 |
| Median rent | $965 | $1,236 | $1,407 |
| Homeownership rate | 75.2% | 72.3% | 65.2% |
The median home price in Jerome County is about 23.7 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $965 per month for that long.
Commute Time & Mobility
Commuters in Jerome County spend about 36 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 151 hours, about 6.3 full days, spent commuting.
| Metric | Jerome County | Idaho Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 18.1 | 18.0 | 22.4 |
| Round-trip commute (min) | 36.2 | 35.9 | 44.8 |
| Yearly time spent (hours) | 151 | 150 | 187 |
| Estimated yearly cost | $4,670 | $4,641 | $5,790 |
| Work from home | 5.8% | 13.3% | 15.0% |
| Highway traffic (vehicles/day) | 7,090 | 4,714 | 8,813 |
| Local road traffic (vehicles/day) | 991 | 865 | 1,355 |
Fastest commutes among counties in
Idaho:
Custer County (8.9 min), Lemhi County (11.6 min), Madison County (12.0 min).
Slowest:
Camas County (49.5 min), Boise County (38.0 min), Lincoln County (32.0 min).
The average commute time in Jerome County is about the same as in Idaho.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Jerome County has a education index of F, which means it scores poorly in education.
| Metric | Jerome County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 12.1% | 27.1% | 31.6% |
| Average household size | 3.02 | 2.64 | 2.53 |
Highest education index among counties in
Idaho:
Latah County (0.4), Teton County (0.3), Ada County (0.3).
Lowest:
Clark County (0.1), Owyhee County (0.2), Lincoln County (0.2).
Health
Jerome County has a health index of C, which means it is somewhat healthy.
| Metric | Jerome County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 78.5 | 79.5 | 78.3 |
| Self-rated poor health | 18.3% | 15.6% | 16.3% |
| Smokers | 19.7% | 17.6% | 19.0% |
Highest health index among counties in
Idaho:
Madison County (0.8), Latah County (0.8), Ada County (0.8).
Lowest:
Shoshone County (0.8), Washington County (0.8), Lincoln County (0.8).
Jerome County, ID Compared With Nearby Counties
Jerome County, ID is typical in size for this group, 25,173 residents against a local median of 24,952, so the measures below are close to a like for like comparison. The measure that sets Jerome County, ID apart most is median home price: $275,000, 48% above the local median of $185,795.
Commute tells the same story from another angle: 18.1 min against a local median of 15.5 min, 17% above it. The one measure here that carries a verdict is commute, and at 17% above the local median it puts Jerome County, ID at the weaker end of the local range. The counties themselves spread $1,723,980 on median home price, so Jerome County, ID sits at one end of an already wide local range rather than apart from it. Jerome County, ID has the 2nd highest median home price of the 4 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Jerome County, ID | 25,173 | $71,652 #2/4 | $275,000 #2/4 | 18.1 min #4/4 |
| Twin Falls County, ID | 89,838 | $68,126 | $185,795 | 15.5 min |
| Minidoka County, ID | 22,208 | $69,748 | $48,747 | 16.4 min |
| Blaine County, ID | 24,952 | $91,552 | $1,772,727 | 14.0 min |
Frequently Asked Questions
Common questions about Jerome County, Idaho.
How big is Jerome County, Idaho by population?
About 25,173 people live in Jerome County, Idaho, in 8,277 households of 3.0 people on average. The median age is 32.7, so residents are younger than the U.S. median of 37.3 by about 5 years.
How densely populated is Jerome County, Idaho?
Averaged over its land area, Jerome County, Idaho has 42 people per square mile, a density typical of rural areas. That is about 48% of the U.S. average of 86.
How affordable is housing in Jerome County, Idaho?
The median home costs 3.8 times the median household income ($275,000 against $71,652), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $965 a month takes about 16% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is unemployment high in Jerome County, Idaho?
Unemployment in Jerome County, Idaho is only 3.6%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
What share of adults in Jerome County, Idaho have a college degree?
12.1% of adults in Jerome County, Idaho hold a bachelor's degree or higher (about 1 in 8), well below the U.S. share of 31.6%.
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