Carroll County, Illinois

Carroll County, Illinois, had an estimated population of 15,419 in 2025 across 1,154 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among Illinois's counties and nationally.

Population
15,419
2025 estimate
Area
1,154 km²
Density
13
per km²
Median income
$60,758
household, ACS 2024
Median age
45.4
years, ACS 2024
How Illinois's counties spread
Amenities & Infrastructure
IndicatorValue
Households with Broadband202486.1%
Median Gross Rent2024$818
Median Home Value2024$114,500
Owner-Occupied Homes202477.2%
Vacant Homes202419.8%
Demography
IndicatorValue
Aged 65 and Over202424.2%
American Indian & Alaska Native20240.3%
Asian, non-Hispanic20240.8%
Average Household Size2024people2.1
Black, non-Hispanic20243.9%
Foreign-Born20242.4%
Hispanic or Latino20245.3%
Median Age2024years45.4
Sex Ratio2024per 1,000 males820
Speak a Language Other Than English20246.0%
Under 18202417.7%
Veterans20248.6%
White, non-Hispanic202487.8%
Economy
IndicatorValue
Below Poverty Line202414.2%
Households on SNAP202415.1%
Income Inequality2024index0.411
Median Household Income2024$60,758
Per Capita Income2024$32,110
Unemployment Rate20243.1%
Education
IndicatorValue
Bachelor's Degree or Higher202417.8%
High School or Higher202488.9%
Health Coverage
IndicatorValue
No Health Insurance20245.8%
With a Disability202416.2%
Population & Density
IndicatorValue
Population202515,419
Population Density2025/km²13
Work & Commute
IndicatorValue
Commute by Public Transit20240.9%
Households with No Vehicle20243.3%
Mean Commute Time2024minutes24.6
Work from Home20246.8%
Compare Carroll County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.