Madison County, Idaho
Located in Idaho, Madison County has a population of 54,618 residents and a median age of 21.4 years, making it the #953 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 24.5%. The median home value is $414,800, and the median household income is $60,160, which is 20% below the national median.
Demographics
Madison County has a population of 54,618, making it the #953 most populous county in the US. The median age is 21.4 years, which is 45.0% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Madison County is $60,160, ranking #2,070 out of 3,222 counties — 19.9% below the national median. The poverty rate is 24.5% and unemployment stands at 8.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Madison County is $414,800 (+47.1% vs national). Renters pay a median of $1,014/mo and the homeownership rate is 40.2%.
Median Home Value Trend
Rankings →Household Type
Education
In Madison County, 41.8% of adults age 25+ hold a bachelor's degree or higher, which is 24.1% above the national average, ranking #231 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Madison County is 79.1 years. 20.3% of adults report poor or fair health and 8.3% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
16.2% of adults in Madison County smoke , 36.6% are obese , and 14.0% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 15.4 per 100,000. Motor vehicle deaths occur at a rate of 5.2 per 100,000.
Suicide Rate Trend
Families & Children
11.5% of children in Madison County live in poverty and the infant mortality rate is 3.0 per 1,000 live births. The teen birth rate is 2.8 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Madison County is 61.3%. The mean commute time is 18.3 min, which is 33.5% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Madison County voted Republican with a margin of 64.3%. The vote was 15.9% Dem / 80.2% Rep. Compared to 2020, the margin shifted 0.7 toward Republicans .
Vote Share Over Time
About Madison County, Idaho
Madison County, Idaho has a total population of 54,618, making it the 953rd most populous county in the United States. The median age in Madison County is 21.4 years, which is 45.0% below the national median of 38.9 years.
The median household income in Madison County is $60,160, which ranks #2,070 of 3,222 counties nationwide. This is 19.9% below the national median of $75,149. The poverty rate is 24.5%, higher than the national rate of 12.6%. The unemployment rate stands at 8.3%.
The median home value in Madison County is $414,800, 47.1% above the national median. Renters in Madison County pay a median gross rent of $1,014 per month. The homeownership rate is 40.2%, compared to the national rate of 64.4%.
In Madison County, 41.8% of residents aged 25 and older hold a bachelor's degree or higher, 24.1% above the national average of 33.7%. Health insurance coverage stands at 95.1% of the population. The average commute time for workers is 18.3 min.
Madison County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 83.5% of the population, followed by Hispanic or Latino (9.8%) and Two or More Races (2.8%).
All data for Madison County, Idaho comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.