Clay County ZIP Codes
Iowa, United States · 9 codes
Clay County in Iowa has 9 ZIP codes, from 51047 to 51366, serving 9 places.
ZIP codes in Clay
Frequently asked questions
What is the ZIP code of Clay?
Clay has 9 ZIP codes, from 51047 to 51366. The table lists the places each one serves.
How many places are listed in Clay County?
9 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.