Custer County, Idaho Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Custer 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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B
Health Around averageAmong the top 5 healthiest counties in Idaho
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D
Income Well below averageAmong the 5 least wealthy counties in Idaho
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D
Education Well below average
Source: Map AI Methodology
Population: density and quick facts
| Metric | Custer County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Population | 4,470 | 1,929,983 | 337,468,954 |
| Population density (per sq mi) | 0.9 | 23.1 | 86.4 |
| Population growth (%/yr) | 0.70% | 2.12% | 0.59% |
| Median age | 60.0 | 38.7 | 37.3 |
| Households | 1,943 | 712,816 | 130,235,071 |
Population in Custer County grew by 6.4% from 2009 to 2024, reaching 4,470 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Custer County is Boomers, aged 61–79, at 30.2% of residents. That is 14.2 points above Idaho as a whole.
- Gen Z 13–28 610 13.6% -9.2 pts
- Millennials 29–44 643 14.4% -6.3 pts
- Gen X 45–60 1,098 24.6% +5.3 pts
- Boomers 61–79 1,351 30.2% +14.2 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 47.3% of the people living in Custer County and men 52.7%.
- Women 47.3% Idaho 49.6%
- Men 52.7% Idaho 50.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Custer County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Custer County has a the economy index of D, which means it is barely prosperous.
| Metric | Custer County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median household income | $64,938 | $78,141 | $80,455 |
| Income growth (%/yr) | 6.97% | 5.97% | 4.80% |
| Unemployment rate | 2.0% | 3.7% | 5.2% |
The median household income in Custer County is about 17% lower than in Idaho.
Housing
| Metric | Custer County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median home price | $308,333 | $394,140 | $248,835 |
| Median rent | $690 | $1,236 | $1,407 |
| Homeownership rate | 76.8% | 72.3% | 65.2% |
The median home price in Custer County is about 37.2 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $690 per month for that long.
Commute Time & Mobility
Commuters in Custer County spend about 18 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 74 hours, about 3.1 full days, spent commuting.
| Metric | Custer County | Idaho Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 8.9 | 18.0 | 22.4 |
| Round-trip commute (min) | 17.8 | 35.9 | 44.8 |
| Yearly time spent (hours) | 74 | 150 | 187 |
| Estimated yearly cost | $2,305 | $4,641 | $5,790 |
| Work from home | 27.3% | 13.3% | 15.0% |
| Highway traffic (vehicles/day) | — | 4,714 | 8,813 |
| Local road traffic (vehicles/day) | 93 | 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 Custer County is 9 minutes, shorter than the 18 minutes 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
Custer County has a education index of D, which means it is barely educated.
| Metric | Custer County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 28.3% | 27.1% | 31.6% |
| Average household size | 2.17 | 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
Custer County has a health index of B, which means it is quite healthy.
| Metric | Custer County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 87.7 | 79.5 | 78.3 |
| Self-rated poor health | 16.1% | 15.6% | 16.3% |
| Smokers | 18.1% | 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).
Custer County, ID Compared With Nearby Counties
How Custer County, ID compares with the 1 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Custer County, ID | 4,470 | $64,938 #2/2 | $308,333 #2/2 | 8.9 min #1/2 |
| Blaine County, ID | 24,952 | $91,552 | $1,772,727 | 14.0 min |
Frequently Asked Questions
Common questions about Custer County, Idaho.
How many people live in Custer County, Idaho?
About 4,470 people live in Custer County, Idaho, in 1,943 households of 2.2 people on average. The median age is 60.0, so residents are older than the U.S. median of 37.3 by about 23 years.
How densely populated is Custer County, Idaho?
Averaged over its land area, Custer County, Idaho has 1 people per square mile, a density typical of rural areas. That is about 1% of the U.S. average of 86.
Is Custer County, Idaho an affordable place to live?
The median home costs 4.7 times the median household income ($308,333 against $64,938), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $690 a month takes about 13% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Custer County, Idaho?
Unemployment in Custer County, Idaho is only 2.0%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
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