Monticello, IL zip code
Monticello, Illinois uses one zip code: 61856. Most of it is in Piatt County. Together these zip codes are home to about 8.2K people.
Zip codes
1
Population
8.2K
All zips combined
Largest zip
61856
8,226 residents
Zip codes in Monticello
| Zip | Type | Population | IncomeMedian income |
|---|---|---|---|
| 61856 | 8,226 | $103,559 |