Carroll County, Iowa
Located in Iowa, Carroll County has a population of 20,594 residents and a median age of 41.1 years, making it the #1,846 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 7.9%. The median home value is $176,000, and the median household income is $72,930, which is 3% below the national median.
Demographics
Carroll County has a population of 20,594, making it the #1,846 most populous county in the US. The median age is 41.1 years, which is 5.7% 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 Carroll County is $72,930, ranking #977 out of 3,222 counties — 3.0% below the national median. The poverty rate is 7.9% and unemployment stands at 1.8%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Carroll County is $176,000 (-37.6% vs national). Renters pay a median of $731/mo and the homeownership rate is 77.1%.
Median Home Value Trend
Rankings →Household Type
Education
In Carroll County, 24.0% of adults age 25+ hold a bachelor's degree or higher, which is 28.8% below the national average, ranking #1,369 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Carroll County is 77.9 years. 15.5% of adults report poor or fair health and 4.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.8% of adults in Carroll County smoke , 42.0% are obese , and 25.3% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 18.9 per 100,000. Motor vehicle deaths occur at a rate of 12.7 per 100,000.
Suicide Rate Trend
Families & Children
8.6% of children in Carroll County live in poverty . The teen birth rate is 8.7 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Carroll County is 74.5%. The mean commute time is 17.3 min, which is 37.4% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Carroll County voted Republican with a margin of 41.9%. The vote was 28.4% Dem / 70.3% Rep. Compared to 2020, the margin shifted 4.1 toward Republicans .
Vote Share Over Time
About Carroll County, Iowa
Carroll County, Iowa has a total population of 20,594, making it the 1,846th most populous county in the United States. The median age in Carroll County is 41.1 years, which is 5.7% above the national median of 38.9 years.
The median household income in Carroll County is $72,930, which ranks #977 of 3,222 counties nationwide. This is 3.0% below the national median of $75,149. The poverty rate is 7.9%, lower than the national rate of 12.6%. The unemployment rate stands at 1.8%.
The median home value in Carroll County is $176,000, 37.6% below the national median. Renters in Carroll County pay a median gross rent of $731 per month. The homeownership rate is 77.1%, compared to the national rate of 64.4%.
In Carroll County, 24.0% of residents aged 25 and older hold a bachelor's degree or higher, 28.8% below the national average of 33.7%. Health insurance coverage stands at 97.2% of the population. The average commute time for workers is 17.3 min.
Carroll County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 91.9% of the population, followed by Two or More Races (3.6%) and Hispanic or Latino (3.5%).
All data for Carroll 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.