Fayette   County IL United States

County FIPS 17051
Largest City Vandalia
State Illinois
Latitude 39.0002
Longitude -89.0241
Population 21,315
Density 29.77 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: $60,944
Median individual: $33,329

Race

Mode: 88.8% White

Gender

 52.1% male 

Rent

  $798 / month  

Median house value: $132,461.0

Age

Median: 41.9 years old

Education

With at least college degree: 17.2%
With STEM degree: 44.7%

Marital Status

 49.4% married 

Never married: 31.0%

Labor Force Participation

 54.8% working 

Unemployed: 3.8%

Average Family Size

 3.20 people 

Commute Time

 25.5 minutes 

Health Care

 7.3% uninsured 

Poverty

 15.5%

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

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