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 a county in Illinois with a population of 109,049. It ranks #17 among counties in Illinois by population. The median age is 42.1, older than the national median. The population is 50.9% male and 49.1% female.
The median household income in LaSalle County is $72,281, near the US median of $74,580. 10.0% of residents live below the federal poverty level. Home values sit at a median of $154,900, with monthly rent averaging $906. The homeownership rate of 73.9% is higher than the national rate of 64.8%.
Educational attainment in LaSalle County reflects 18.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 4.6% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 26.1 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+
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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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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.