Clay County ZIP Codes
Illinois, United States · 6 codes
Clay County in Illinois has 6 ZIP codes, from 62434 to 62899, serving 6 places.
ZIP codes in Clay
Frequently asked questions
What is the ZIP code of Clay?
Clay has 6 ZIP codes, from 62434 to 62899. The table lists the places each one serves.
How many places are listed in Clay County?
6 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.