Jefferson County ZIP Codes
Illinois, United States · 12 codes
Jefferson County in Illinois has 12 ZIP codes, from 62810 to 62898, serving 12 places.
ZIP codes in Jefferson
Frequently asked questions
What is the ZIP code of Jefferson?
Jefferson has 12 ZIP codes, from 62810 to 62898. The table lists the places each one serves.
How many places are listed in Jefferson County?
12 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.