Warren County ZIP Codes
Illinois, United States · 8 codes
Warren County in Illinois has 8 ZIP codes, from 61417 to 61478, serving 8 places.
ZIP codes in Warren
Frequently asked questions
What is the ZIP code of Warren?
Warren has 8 ZIP codes, from 61417 to 61478. The table lists the places each one serves.
How many places are listed in Warren County?
8 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.