Mason   County IL United States

County FIPS 17125
Largest City Havana
State Illinois
Latitude 40.2396
Longitude -89.9168
Population 12,745
Density 23.63 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: $62,845
Median individual: $36,025

Race

Mode: 94.6% White

Gender

 50.3% female 

Rent

  $802 / month  

Median house value: $103,400.0

Age

Median: 45.4 years old

Education

With at least college degree: 17.1%
With STEM degree: 50.0%

Marital Status

 50.9% married 

Never married: 24.9%

Labor Force Participation

 54.3% working 

Unemployed: 4.9%

Average Family Size

 2.74 people 

Commute Time

 30.4 minutes 

Health Care

 3.9% uninsured 

Poverty

 14.8%

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

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