McLean County, Illinois
Located in Illinois, McLean County has a population of 171,556 residents and a median age of 34.3 years, making it the #399 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 12.9%. The median home value is $208,400, and the median household income is $79,905, which is 6% above the national median.
Demographics
McLean County has a population of 171,556, making it the #399 most populous county in the US. The median age is 34.3 years, which is 11.8% 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 McLean County is $79,905, ranking #589 out of 3,222 counties — 6.3% above the national median. The poverty rate is 12.9% and unemployment stands at 3.1%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in McLean County is $208,400 (-26.1% vs national). Renters pay a median of $1,009/mo and the homeownership rate is 65.1%.
Median Home Value Trend
Rankings →Household Type
Education
In McLean County, 47.2% of adults age 25+ hold a bachelor's degree or higher, which is 40.1% above the national average, ranking #135 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in McLean County is 78.5 years. 16.0% of adults report poor or fair health and 4.8% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
14.3% of adults in McLean County smoke , 35.4% are obese , and 21.5% report excessive drinking. The drug overdose death rate is 13.3 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in McLean County is 3.6 per 100,000 and the suicide rate is 12.8 per 100,000. Motor vehicle deaths occur at a rate of 7.2 per 100,000.
Homicide Rate Trend
Families & Children
9.0% of children in McLean County live in poverty and the infant mortality rate is 5.2 per 1,000 live births. The teen birth rate is 7.7 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in McLean County is 67.5%. The mean commute time is 20.3 min, which is 26.4% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, McLean County voted Democratic with a margin of 4.8%. The vote was 51.6% Dem / 46.8% Rep. Compared to 2020, the margin shifted +0.8 toward Democrats .
Vote Share Over Time
About McLean County, Illinois
McLean County, Illinois has a total population of 171,556, making it the 399th most populous county in the United States. The median age in McLean County is 34.3 years, which is 11.8% below the national median of 38.9 years.
The median household income in McLean County is $79,905, which ranks #589 of 3,222 counties nationwide. This is 6.3% above the national median of $75,149. The poverty rate is 12.9%, higher than the national rate of 12.6%. The unemployment rate stands at 3.1%.
The median home value in McLean County is $208,400, 26.1% below the national median. Renters in McLean County pay a median gross rent of $1,009 per month. The homeownership rate is 65.1%, compared to the national rate of 64.4%.
In McLean County, 47.2% of residents aged 25 and older hold a bachelor's degree or higher, 40.1% above the national average of 33.7%. Health insurance coverage stands at 95.4% of the population. The average commute time for workers is 20.3 min.
McLean County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 76.2% of the population, followed by Black (non-Hispanic) (8.4%) and Hispanic or Latino (6.4%).
All data for McLean 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.