Madison County, Idaho Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Madison 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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A
Health Above averageHealthiest county in Idaho
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D
Income Well below averageLeast wealthy county in Idaho
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C
Education Below averageBetter educated than 84% of counties in Idaho
Source: Map AI Methodology
Population: density and quick facts
| Metric | Madison County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Population | 54,618 | 1,929,983 | 337,468,954 |
| Population density (per sq mi) | 115.5 | 23.1 | 86.4 |
| Population growth (%/yr) | 4.94% | 2.12% | 0.59% |
| Median age | 21.0 | 38.7 | 37.3 |
| Households | 13,326 | 712,816 | 130,235,071 |
Population in Madison County grew by 47.1% from 2009 to 2024, reaching 54,618 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Madison County is Gen Z, aged 13–28, at 51.7% of residents. That is 28.9 points above Idaho as a whole.
- Gen Z 13–28 28,250 51.7% +28.9 pts
- Millennials 29–44 7,297 13.4% -7.4 pts
- Gen X 45–60 4,772 8.7% -10.5 pts
- Boomers 61–79 3,492 6.4% -9.6 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 51.7% of the people living in Madison County and men 48.3%.
- Women 51.7% Idaho 49.6%
- Men 48.3% Idaho 50.4%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Madison County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Madison County has a the economy index of D, which means it is barely prosperous.
| Metric | Madison County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median household income | $60,340 | $78,141 | $80,455 |
| Income growth (%/yr) | 7.72% | 5.97% | 4.80% |
| Unemployment rate | 8.3% | 3.7% | 5.2% |
The median household income in Madison County is about 23% lower than in Idaho.
Housing
| Metric | Madison County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Median home price | $295,731 | $394,140 | $248,835 |
| Median rent | $1,014 | $1,236 | $1,407 |
| Homeownership rate | 40.2% | 72.3% | 65.2% |
The median home price in Madison County is about 24.3 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,014 per month for that long.
Commute Time & Mobility
Commuters in Madison County spend about 24 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 100 hours, about 4.2 full days, spent commuting.
| Metric | Madison County | Idaho Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 12.0 | 18.0 | 22.4 |
| Round-trip commute (min) | 23.9 | 35.9 | 44.8 |
| Yearly time spent (hours) | 100 | 150 | 187 |
| Estimated yearly cost | $3,089 | $4,641 | $5,790 |
| Work from home | 13.3% | 13.3% | 15.0% |
| Highway traffic (vehicles/day) | 5,500 | 4,714 | 8,813 |
| Local road traffic (vehicles/day) | 959 | 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 Madison County is 12 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
Madison County has a education index of C, which means it is somewhat educated.
| Metric | Madison County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 18.1% | 27.1% | 31.6% |
| Average household size | 3.23 | 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
Madison County has a health index of A, which means it is very healthy.
| Metric | Madison County | Idaho Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 79.2 | 79.5 | 78.3 |
| Self-rated poor health | 11.9% | 15.6% | 16.3% |
| Smokers | 14.0% | 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).
Madison County, ID Compared With Nearby Counties
How Madison County, ID compares with the 2 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Madison County, ID | 54,618 | $60,340 #3/3 | $295,731 #2/3 | 12.0 min #1/3 |
| Bonneville County, ID | 129,518 | $80,129 | $378,543 | 16.0 min |
| Jefferson County, ID | 33,153 | $86,175 | $169,582 | 22.1 min |
Frequently Asked Questions
Common questions about Madison County, Idaho.
What is the population of Madison County, Idaho?
About 54,618 people live in Madison County, Idaho, in 13,326 households of 3.2 people on average. The median age is 21.0, so residents are younger than the U.S. median of 37.3 by about 16 years.
How densely populated is Madison County, Idaho?
Averaged over its land area, Madison County, Idaho has 115 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is close to the U.S. average of 86.
How affordable is housing in Madison County, Idaho?
The median home costs 4.9 times the median household income ($295,731 against $60,340), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,014 a month takes about 20% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How strong is the job market in Madison County, Idaho?
Unemployment in Madison County, Idaho is 8.3%, well above the U.S. rate of 5.2%, so job seekers may face more competition than elsewhere.
How common is a college degree in Madison County, Idaho?
18.1% of adults in Madison County, Idaho hold a bachelor's degree or higher (about 1 in 6), well below the U.S. share of 31.6%.
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