Cass County, Illinois
Located in Illinois, Cass County has a population of 12,784 residents and a median age of 38.3 years, making it the #2,298 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.1%. The median home value is $97,100, and the median household income is $68,125, which is 9% below the national median.
Demographics
Cass County has a population of 12,784, making it the #2,298 most populous county in the US. The median age is 38.3 years, which is 1.5% below 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 Cass County is $68,125, ranking #1,330 out of 3,222 counties — 9.3% below the national median. The poverty rate is 11.1% and unemployment stands at 4.2%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Cass County is $97,100 (-65.6% vs national). Renters pay a median of $723/mo and the homeownership rate is 75.9%.
Median Home Value Trend
Rankings →Household Type
Education
In Cass County, 20.8% of adults age 25+ hold a bachelor's degree or higher, which is 38.4% below the national average, ranking #1,865 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Cass County is 76.8 years. 20.1% of adults report poor or fair health and 7.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.5% of adults in Cass County smoke , 38.5% are obese , and 20.5% report excessive drinking.
Adult Smoking Trend
Safety
The suicide rate is 21.3 per 100,000. Motor vehicle deaths occur at a rate of 23.0 per 100,000.
Suicide Rate Trend
Families & Children
16.7% of children in Cass County live in poverty . The teen birth rate is 29.9 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Cass County is 63.7%. The mean commute time is 22.9 min, which is 17.1% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Cass County voted Republican with a margin of 43.4%. The vote was 27.4% Dem / 70.8% Rep. Compared to 2020, the margin shifted 5.6 toward Republicans .
Vote Share Over Time
About Cass County, Illinois
Cass County, Illinois has a total population of 12,784, making it the 2,298th most populous county in the United States. The median age in Cass County is 38.3 years, which is 1.5% below the national median of 38.9 years.
The median household income in Cass County is $68,125, which ranks #1,330 of 3,222 counties nationwide. This is 9.3% below the national median of $75,149. The poverty rate is 11.1%, lower than the national rate of 12.6%. The unemployment rate stands at 4.2%.
The median home value in Cass County is $97,100, 65.6% below the national median. Renters in Cass County pay a median gross rent of $723 per month. The homeownership rate is 75.9%, compared to the national rate of 64.4%.
In Cass County, 20.8% of residents aged 25 and older hold a bachelor's degree or higher, 38.4% below the national average of 33.7%. Health insurance coverage stands at 92.3% of the population. The average commute time for workers is 22.9 min.
Cass County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 69.9% of the population, followed by Hispanic or Latino (22.9%) and Black (non-Hispanic) (4.0%).
All data for Cass 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.