Clinton   County IL United States

County FIPS 17027
Largest City Centralia
State Illinois
Latitude 38.6065
Longitude -89.4225
Population 36,954
Density 78.01 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: $86,588
Median individual: $44,057

Race

Mode: 90.9% White

Gender

 51.8% male 

Rent

  $912 / month  

Median house value: $190,894.0

Age

Median: 41.5 years old

Education

With at least college degree: 25.9%
With STEM degree: 41.4%

Marital Status

 56.0% married 

Never married: 27.6%

Labor Force Participation

 62.8% working 

Unemployed: 3.4%

Average Family Size

 2.94 people 

Commute Time

 25.9 minutes 

Health Care

 4.8% uninsured 

Poverty

 7.4%

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

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