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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2022

ZIP Codes for City of Monticello, IL

Monticello, IL Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 61856StandardPiatt7,433217

Timezone(s):Central (GMT -06:00)
Counties:PIATT, IL
Population:5,548 (More Details)
Male Population:2,640
Female Population:2,908
Median Age:43
ZIP Codes:1
Area Codes:1
Total Area:439 square miles (county)
Land Area:439 square miles (county)
Water Area:0 square miles (county)

Monticello, IL Demographic Information *

Total population5,548
Male population2,640
Female population2,908
Median age (years)42.7
White Population5,413
Black Population28
Indian Population7
Asian Population31
Hawaiian Population2
Hispanic Population50
Median age (Male)41
Median age (Female)44
Total households2,332
Family households (families)1,573
Average household size2.37
Average family size2.9
Total housing units2,492
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 5/1/2022],
  2. Internal Data Creation [Last Updated: 5/1/2022],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],