Lee County, Illinois
Located in Illinois, Lee County has a population of 33,869 residents and a median age of 43.1 years, making it the #1,369 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 11.8%. The median home value is $154,600, and the median household income is $70,292, which is 6% below the national median.
Demographics
Lee County has a population of 33,869, making it the #1,369 most populous county in the US. The median age is 43.1 years, which is 10.8% 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 Lee County is $70,292, ranking #1,179 out of 3,222 counties — 6.5% below the national median. The poverty rate is 11.8% and unemployment stands at 5.2%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Lee County is $154,600 (-45.2% vs national). Renters pay a median of $894/mo and the homeownership rate is 73.6%.
Median Home Value Trend
Rankings →Household Type
Education
In Lee County, 19.4% of adults age 25+ hold a bachelor's degree or higher, which is 42.5% below the national average, ranking #2,112 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Lee County is 77.4 years. 18.7% of adults report poor or fair health and 5.6% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
18.5% of adults in Lee County smoke , 37.5% are obese , and 21.7% report excessive drinking. The drug overdose death rate is 13.8 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 18.7 per 100,000. Motor vehicle deaths occur at a rate of 13.8 per 100,000.
Suicide Rate Trend
Families & Children
13.9% of children in Lee County live in poverty . The teen birth rate is 11.6 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Lee County is 60.6%. The mean commute time is 26.3 min, which is 4.5% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Lee County voted Republican with a margin of 22.3%. The vote was 37.9% Dem / 60.2% Rep. Compared to 2020, the margin shifted 2.7 toward Republicans .
Vote Share Over Time
About Lee County, Illinois
Lee County, Illinois has a total population of 33,869, making it the 1,369th most populous county in the United States. The median age in Lee County is 43.1 years, which is 10.8% above the national median of 38.9 years.
The median household income in Lee County is $70,292, which ranks #1,179 of 3,222 counties nationwide. This is 6.5% below the national median of $75,149. The poverty rate is 11.8%, lower than the national rate of 12.6%. The unemployment rate stands at 5.2%.
The median home value in Lee County is $154,600, 45.2% below the national median. Renters in Lee County pay a median gross rent of $894 per month. The homeownership rate is 73.6%, compared to the national rate of 64.4%.
In Lee County, 19.4% of residents aged 25 and older hold a bachelor's degree or higher, 42.5% below the national average of 33.7%. Health insurance coverage stands at 96.2% of the population. The average commute time for workers is 26.3 min.
Lee County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 83.4% of the population, followed by Hispanic or Latino (7.6%) and Black (non-Hispanic) (5.3%).
All data for Lee 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.