61856   Zip Code Monticello Piatt IL United States

City Monticello
County Piatt
State Illinois
Latitude 40.02838
Longitude -88.58211
Population 8,226
Density 76.17 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: $103,559
Median individual: $53,915

Race

Mode: 95.3% White

Gender

 51.0% male 

Rent

  $1398 / month  

Median house value: $230,635.0

Age

Median: 42.9 years old

Education

With at least college degree: 42.7%
With STEM degree: 40.1%

Marital Status

 65.5% married 

Never married: 21.2%

Labor Force Participation

 65.8% working 

Unemployed: 0.7%

Average Family Size

 2.82 people 

Commute Time

 22.9 minutes 

Health Care

 2.0% uninsured 

Poverty

 4.5%

All data comes from the SimpleMaps US Zips Comprehensive Database, February 2026.

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