Jefferson County, Illinois

Jefferson County is home to 36,550 people. 13.5% of residents live below the poverty line, above the Illinois rate (11.8%). The median household income is $63,118.

Open the interactive county page · See it on the map

MeasureValueIllinoisYearSource
Population36,55012,694,7982024Decennial Census and American Community Survey 5-year estimates
Median household income$63,118$83,3902024Decennial Census and American Community Survey 5-year estimates
Below poverty line13.5%11.8%2024Decennial Census and American Community Survey 5-year estimates
Children in poverty18.8%15.1%2024Decennial Census and American Community Survey 5-year estimates
No health insurance7.2%6.9%2024Decennial Census and American Community Survey 5-year estimates
Bachelor's degree or higher18.2%37.8%2024Decennial Census and American Community Survey 5-year estimates
Median home value$126,000$263,3002024Decennial Census and American Community Survey 5-year estimates
Median gross rent$885$1,2742024Decennial Census and American Community Survey 5-year estimates
Renters paying 30%+ of income43.3%47.9%2024Decennial Census and American Community Survey 5-year estimates
Foreign-born1.9%14.7%2024Decennial Census and American Community Survey 5-year estimates
Median age41.2 years39.0 years2024Decennial Census and American Community Survey 5-year estimates

Neighboring counties

Figures are the latest published estimates, from the sources named; survey estimates carry margins of error.