Franklin County, Illinois
Located in Illinois, Franklin County has a population of 37,323 residents and a median age of 43.4 years, making it the #1,275 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 17.5%. The median home value is $89,000, and the median household income is $56,740, which is 24% below the national median.
Demographics
Franklin County has a population of 37,323, making it the #1,275 most populous county in the US. The median age is 43.4 years, which is 11.6% 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 Franklin County is $56,740, ranking #2,355 out of 3,222 counties — 24.5% below the national median. The poverty rate is 17.5% and unemployment stands at 7.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Franklin County is $89,000 (-68.4% vs national). Renters pay a median of $803/mo and the homeownership rate is 74.1%.
Median Home Value Trend
Rankings →Household Type
Education
In Franklin County, 15.8% of adults age 25+ hold a bachelor's degree or higher, which is 53.2% below the national average, ranking #2,708 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Franklin County is 72.5 years. 20.8% of adults report poor or fair health and 7.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
20.3% of adults in Franklin County smoke , 39.6% are obese , and 21.1% report excessive drinking. The drug overdose death rate is 25.7 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 24.2 per 100,000. Motor vehicle deaths occur at a rate of 20.5 per 100,000.
Suicide Rate Trend
Families & Children
23.0% of children in Franklin County live in poverty and the infant mortality rate is 8.0 per 1,000 live births. The teen birth rate is 29.6 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Franklin County is 62.1%. The mean commute time is 28.7 min, which is 3.9% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Franklin County voted Republican with a margin of 50.5%. The vote was 24.1% Dem / 74.6% Rep. Compared to 2020, the margin shifted 3.0 toward Republicans .
Vote Share Over Time
About Franklin County, Illinois
Franklin County, Illinois has a total population of 37,323, making it the 1,275th most populous county in the United States. The median age in Franklin County is 43.4 years, which is 11.6% above the national median of 38.9 years.
The median household income in Franklin County is $56,740, which ranks #2,355 of 3,222 counties nationwide. This is 24.5% below the national median of $75,149. The poverty rate is 17.5%, higher than the national rate of 12.6%. The unemployment rate stands at 7.6%.
The median home value in Franklin County is $89,000, 68.4% below the national median. Renters in Franklin County pay a median gross rent of $803 per month. The homeownership rate is 74.1%, compared to the national rate of 64.4%.
In Franklin County, 15.8% of residents aged 25 and older hold a bachelor's degree or higher, 53.2% below the national average of 33.7%. Health insurance coverage stands at 92.7% of the population. The average commute time for workers is 28.7 min.
Franklin County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 94.1% of the population, followed by Two or More Races (2.8%) and Hispanic or Latino (2.0%).
All data for Franklin 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.