LaSalle County, Illinois
Located in Illinois, LaSalle County has a population of 108,714 residents and a median age of 42.2 years, making it the #578 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 13.9%. The median home value is $161,900, and the median household income is $73,045, which is 3% below the national median.
Demographics
LaSalle County has a population of 108,714, making it the #578 most populous county in the US. The median age is 42.2 years, which is 8.5% 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 LaSalle County is $73,045, ranking #969 out of 3,222 counties — 2.8% below the national median. The poverty rate is 13.9% and unemployment stands at 5.3%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in LaSalle County is $161,900 (-42.6% vs national). Renters pay a median of $928/mo and the homeownership rate is 74.4%.
Median Home Value Trend
Rankings →Household Type
Education
In LaSalle County, 20.5% of adults age 25+ hold a bachelor's degree or higher, which is 39.2% below the national average, ranking #1,912 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in LaSalle County is 75.8 years. 17.8% of adults report poor or fair health and 6.2% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
16.6% of adults in LaSalle County smoke , 36.6% are obese , and 22.5% report excessive drinking. The drug overdose death rate is 33.3 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in LaSalle County is 2.1 per 100,000 and the suicide rate is 18.3 per 100,000. Motor vehicle deaths occur at a rate of 14.3 per 100,000.
Homicide Rate Trend
Families & Children
15.9% of children in LaSalle County live in poverty and the infant mortality rate is 6.4 per 1,000 live births. The teen birth rate is 18.4 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in LaSalle County is 64.0%. The mean commute time is 27.7 min, which is 0.4% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, LaSalle County voted Republican with a margin of 18.5%. The vote was 40.1% Dem / 58.6% Rep. Compared to 2020, the margin shifted 4.2 toward Republicans .
Vote Share Over Time
About LaSalle County, Illinois
LaSalle County, Illinois has a total population of 108,714, making it the 578th most populous county in the United States. The median age in LaSalle County is 42.2 years, which is 8.5% above the national median of 38.9 years.
The median household income in LaSalle County is $73,045, which ranks #969 of 3,222 counties nationwide. This is 2.8% below the national median of $75,149. The poverty rate is 13.9%, higher than the national rate of 12.6%. The unemployment rate stands at 5.3%.
The median home value in LaSalle County is $161,900, 42.6% below the national median. Renters in LaSalle County pay a median gross rent of $928 per month. The homeownership rate is 74.4%, compared to the national rate of 64.4%.
In LaSalle County, 20.5% of residents aged 25 and older hold a bachelor's degree or higher, 39.2% below the national average of 33.7%. Health insurance coverage stands at 96.0% of the population. The average commute time for workers is 27.7 min.
LaSalle County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 82.1% of the population, followed by Hispanic or Latino (11.2%) and Two or More Races (3.1%).
All data for LaSalle 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.