Washington   County IL United States

County FIPS 17189
Largest City Centralia
State Illinois
Latitude 38.3522
Longitude -89.4105
Population 13,627
Density 24.22 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: $78,224
Median individual: $42,725

Race

Mode: 95.2% White

Gender

 50.7% male 

Rent

  $818 / month  

Median house value: $155,955.0

Age

Median: 44.2 years old

Education

With at least college degree: 23.5%
With STEM degree: 43.9%

Marital Status

 55.4% married 

Never married: 25.8%

Labor Force Participation

 63.3% working 

Unemployed: 4.3%

Average Family Size

 2.84 people 

Commute Time

 26.7 minutes 

Health Care

 3.4% uninsured 

Poverty

 7.5%

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

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