Madison County, Iowa
Located in Iowa, Madison County has a population of 16,926 residents and a median age of 40.6 years, making it the #2,042 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.0%. The median home value is $245,100, and the median household income is $90,855, which is 21% above the national median.
Demographics
Madison County has a population of 16,926, making it the #2,042 most populous county in the US. The median age is 40.6 years, which is 4.4% above 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 $90,855, ranking #284 out of 3,222 counties — 20.9% above the national median. The poverty rate is 7.0% and unemployment stands at 3.5%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Madison County is $245,100 (-13.1% vs national). Renters pay a median of $1,036/mo and the homeownership rate is 80.1%.
Median Home Value Trend
Rankings →Household Type
Education
In Madison County, 27.1% of adults age 25+ hold a bachelor's degree or higher, which is 19.5% below the national average, ranking #1,002 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Madison County is 78.8 years. 11.7% of adults report poor or fair health and 4.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
13.0% of adults in Madison County smoke , 38.2% are obese , and 25.1% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 16.0 per 100,000. Motor vehicle deaths occur at a rate of 18.3 per 100,000.
Suicide Rate Trend
Families & Children
6.7% of children in Madison County live in poverty . The teen birth rate is 6.4 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Madison County is 80.8%. The mean commute time is 30.3 min, which is 9.7% above 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 38.6%. The vote was 30.1% Dem / 68.7% Rep. Compared to 2020, the margin shifted 4.3 toward Republicans .
Vote Share Over Time
About Madison County, Iowa
Madison County, Iowa has a total population of 16,926, making it the 2,042nd most populous county in the United States. The median age in Madison County is 40.6 years, which is 4.4% above the national median of 38.9 years.
The median household income in Madison County is $90,855, which ranks #284 of 3,222 counties nationwide. This is 20.9% above the national median of $75,149. The poverty rate is 7.0%, lower than the national rate of 12.6%. The unemployment rate stands at 3.5%.
The median home value in Madison County is $245,100, 13.1% below the national median. Renters in Madison County pay a median gross rent of $1,036 per month. The homeownership rate is 80.1%, compared to the national rate of 64.4%.
In Madison County, 27.1% of residents aged 25 and older hold a bachelor's degree or higher, 19.5% below the national average of 33.7%. Health insurance coverage stands at 95.1% of the population. The average commute time for workers is 30.3 min.
Madison County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 94.3% of the population, followed by Hispanic or Latino (2.3%) and Two or More Races (2.2%).
All data for Madison County, Iowa 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.