Randolph County, Illinois
Located in Illinois, Randolph County has a population of 30,058 residents and a median age of 43.7 years, making it the #1,478 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 14.6%. The median home value is $135,100, and the median household income is $68,131, which is 9% below the national median.
Demographics
Randolph County has a population of 30,058, making it the #1,478 most populous county in the US. The median age is 43.7 years, which is 12.3% 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 Randolph County is $68,131, ranking #1,329 out of 3,222 counties — 9.3% below the national median. The poverty rate is 14.6% and unemployment stands at 5.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Randolph County is $135,100 (-52.1% vs national). Renters pay a median of $780/mo and the homeownership rate is 76.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Randolph County, 15.2% of adults age 25+ hold a bachelor's degree or higher, which is 54.8% below the national average, ranking #2,779 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Randolph County is 75.8 years. 18.8% of adults report poor or fair health and 7.3% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
18.4% of adults in Randolph County smoke , 37.7% are obese , and 21.3% report excessive drinking. The drug overdose death rate is 20.8 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Randolph County is 5.3 per 100,000 and the suicide rate is 15.2 per 100,000. Motor vehicle deaths occur at a rate of 29.9 per 100,000.
Homicide Rate Trend
Families & Children
14.9% of children in Randolph County live in poverty . The teen birth rate is 25.2 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Randolph County is 58.4%. The mean commute time is 25.8 min, which is 6.4% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Randolph County voted Republican with a margin of 50.0%. The vote was 24.1% Dem / 74.1% Rep. Compared to 2020, the margin shifted +0.2 toward Democrats .
Vote Share Over Time
About Randolph County, Illinois
Randolph County, Illinois has a total population of 30,058, making it the 1,478th most populous county in the United States. The median age in Randolph County is 43.7 years, which is 12.3% above the national median of 38.9 years.
The median household income in Randolph County is $68,131, which ranks #1,329 of 3,222 counties nationwide. This is 9.3% below the national median of $75,149. The poverty rate is 14.6%, higher than the national rate of 12.6%. The unemployment rate stands at 5.0%.
The median home value in Randolph County is $135,100, 52.1% below the national median. Renters in Randolph County pay a median gross rent of $780 per month. The homeownership rate is 76.6%, compared to the national rate of 64.4%.
In Randolph County, 15.2% of residents aged 25 and older hold a bachelor's degree or higher, 54.8% below the national average of 33.7%. Health insurance coverage stands at 94.7% of the population. The average commute time for workers is 25.8 min.
Randolph County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 85.1% of the population, followed by Black (non-Hispanic) (8.2%) and Hispanic or Latino (3.8%).
All data for Randolph County, Illinois 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.