LaSalle   County IL United States

County FIPS 17099
Largest City Ottawa
State Illinois
Latitude 41.3440
Longitude -88.8859
Population 108,714
Density 95.8 people per square mile
Time Zone America/Chicago
  • All demographic data comes from the 2024 American Community Survey (5-year study).
  • Learn more about each field.
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Household Income

Median household: $73,045
Median individual: $39,867

Race

Mode: 85.5% White

Gender

 51.0% male 

Rent

  $928 / month  

Median house value: $162,112.0

Age

Median: 42.2 years old

Education

With at least college degree: 20.5%
With STEM degree: 41.0%

Marital Status

 49.3% married 

Never married: 30.4%

Labor Force Participation

 61.3% working 

Unemployed: 5.4%

Average Family Size

 2.87 people 

Commute Time

 26.0 minutes 

Health Care

 4.0% uninsured 

Poverty

 13.9%

All data comes from the SimpleMaps US Counties Database, 2026.

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