Monroe   County IL United States

County FIPS 17133
Largest City Waterloo
State Illinois
Latitude 38.2785
Longitude -90.1773
Population 35,036
Density 90.96 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: $102,880
Median individual: $50,857

Race

Mode: 96.0% White

Gender

 50.2% male 

Rent

  $1042 / month  

Median house value: $284,002.0

Age

Median: 43.2 years old

Education

With at least college degree: 38.7%
With STEM degree: 37.7%

Marital Status

 60.0% married 

Never married: 22.9%

Labor Force Participation

 68.3% working 

Unemployed: 1.9%

Average Family Size

 3.00 people 

Commute Time

 28.3 minutes 

Health Care

 2.5% uninsured 

Poverty

 5.0%

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

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