Iroquois County, Illinois
Located in Illinois, Iroquois County has a population of 26,449 residents and a median age of 44.4 years, making it the #1,596 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 12.5%. The median home value is $137,800, and the median household income is $66,255, which is 12% below the national median.
Demographics
Iroquois County has a population of 26,449, making it the #1,596 most populous county in the US. The median age is 44.4 years, which is 14.1% 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 Iroquois County is $66,255, ranking #1,501 out of 3,222 counties — 11.8% below the national median. The poverty rate is 12.5% and unemployment stands at 4.5%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Iroquois County is $137,800 (-51.1% vs national). Renters pay a median of $799/mo and the homeownership rate is 80.0%.
Median Home Value Trend
Rankings →Household Type
Education
In Iroquois County, 18.2% of adults age 25+ hold a bachelor's degree or higher, which is 46.0% below the national average, ranking #2,325 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Iroquois County is 74.7 years. 18.2% of adults report poor or fair health and 7.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
17.3% of adults in Iroquois County smoke , 38.3% are obese , and 21.7% report excessive drinking. The drug overdose death rate is 26.3 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 11.3 per 100,000. Motor vehicle deaths occur at a rate of 30.9 per 100,000.
Suicide Rate Trend
Families & Children
16.1% of children in Iroquois County live in poverty . The teen birth rate is 15.6 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Iroquois County is 66.8%. The mean commute time is 27.3 min, which is 1.1% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Iroquois County voted Republican with a margin of 57.4%. The vote was 20.6% Dem / 78% Rep. Compared to 2020, the margin shifted 0.7 toward Republicans .
Vote Share Over Time
About Iroquois County, Illinois
Iroquois County, Illinois has a total population of 26,449, making it the 1,596th most populous county in the United States. The median age in Iroquois County is 44.4 years, which is 14.1% above the national median of 38.9 years.
The median household income in Iroquois County is $66,255, which ranks #1,501 of 3,222 counties nationwide. This is 11.8% below the national median of $75,149. The poverty rate is 12.5%, lower than the national rate of 12.6%. The unemployment rate stands at 4.5%.
The median home value in Iroquois County is $137,800, 51.1% below the national median. Renters in Iroquois County pay a median gross rent of $799 per month. The homeownership rate is 80.0%, compared to the national rate of 64.4%.
In Iroquois County, 18.2% of residents aged 25 and older hold a bachelor's degree or higher, 46.0% below the national average of 33.7%. Health insurance coverage stands at 94.0% of the population. The average commute time for workers is 27.3 min.
Iroquois County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 87.2% of the population, followed by Hispanic or Latino (8.3%) and Two or More Races (2.9%).
All data for Iroquois 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.