LaSalle County, Illinois Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 17th-largest in Illinois
The population of LaSalle County, Illinois is 109,049 as of the 2023 American Community Survey, making it the 17th-largest county in Illinois. The median household income is $72,281, the median home value is $154,900, and the median age is 42.1.
The population of LaSalle County has declined 4.8% since 2010 (113,812 → 108,390), a -0.35% annualized rate.
109,049
Population
-0.35%
Annual growth
96
People / sq mi
$72,281
Median Income
$154,900
Median Home Value
LaSalle County covers 1,135 sq mi of land at 96.1 people per square mile.
About LaSalle County, IL
LaSalle County is distinguished by its share of foreign-born residents, 12.1% of the population. LaSalle County is a county in Illinois with a population of 109,049. It ranks #17 among counties in Illinois by population.
The typical household earns $72,281 a year, below the US median of $78,538. Poverty runs at 10.0%, below the national 12.4%. The typical home is valued at $154,900, with typical rent around $906.
18.7% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. Most workers commute: only 4.6% work from home, below the national 14.0%, and the average commute runs about 26 minutes each way.
LaSalle County Population History (2010-2024)
The county of LaSalle County had a population of 113,812 in 2010 and 108,390 in 2024, a -4.8% growth over 14 years. The peak was 113,812 in 2010. Average annual growth rate: -0.35%.
108,390
Population (2024)
113,812
Population (2010)
113,812
Peak (2010)
-0.35%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 113,812 |
| 2011 | 113,527 |
| 2012 | 112,913 |
| 2013 | 112,419 |
| 2014 | 111,650 |
| 2015 | 111,015 |
| 2016 | 110,176 |
| 2017 | 109,590 |
| 2018 | 109,136 |
| 2019 | 108,517 |
| 2020 | 109,409 |
| 2021 | 109,166 |
| 2022 | 108,210 |
| 2023 | 108,397 |
| 2024 | 108,390 |
Race & Ethnicity
| White | 86.8% |
| Black or African American | 2.7% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.7% |
| Two or More Races | 0.0% |
Age & Sex
42.1
Median Age
49.1%
Female
50.9%
Male
19.4%
Age 65+
Age Distribution
Children (under 15): 17.3% · Seniors (65+): 19.4%
Income & Poverty
| Median household income | $72,281$-9,421 vs state |
| Mean household income | $90,125 |
| Per-capita income | $38,079 |
| Poverty rate | 10.0%+1.8% vs state |
| Unemployment rate | 3.5% |
| Employment-to-population | 58.7% |
Top Industries by Employment
The largest employment sector in LaSalle County is professional & business services, accounting for 20.8% of workers.
How residents commute
0.1%
Drive alone
1.7%
Carpool
84.0%
Public transit
4.6%
Work from home
26.1 min
Avg commute
Housing
$154,900$-95,600 vs state
Median home value
$906
Median rent
73.9%
Homeownership rate
49,838
Total housing units
90.5%
Occupied
9.5%
Vacant
26.1%
Renter-occupied
Social & access
96.0%
With health insurance
92.2%
With broadband internet
12.1%
Foreign-born
7.7%
Veterans (18+)
13.8%
With a disability
92.1%
Speak language other than English at home
Education
91.4%
High School+
18.7%
Bachelor's+
Largest cities in Illinois
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County rankings
Frequently Asked Questions
LaSalle County, Illinois has a population of 109,049 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 17th-largest county in Illinois. Population density is 96 people per square mile.
The population of LaSalle County has declined 4.8% since 2010 (113,812 → 108,390), a -0.35% annualized rate.
The median household income in LaSalle County, Illinois is $72,281, with mean (average) household income of $90,125 and per-capita income of $38,079. 10.0% of residents live below the federal poverty level.
In LaSalle County, the largest racial and ethnic groups are White (86.8%), Black or African American (2.7%), Hispanic or Latino (0.7%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in LaSalle County, Illinois is 42.1 years. Residents are 49.1% female and 50.9% male.
The median home value in LaSalle County is $154,900 and median monthly rent is $906. 73.9% of occupied housing units are owner-occupied. The county has 49,838 total housing units, 9.5% of which are vacant.
The largest employment sector in LaSalle County, Illinois is professional, scientific, and management services, employing 20.8% of workers. The unemployment rate is 3.5%.
Chicago is among the largest cities associated with LaSalle County, Illinois, with a population of 2,707,648.
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Statewide data for Illinois
Population, race, income, age, and trends across Illinois
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.