Defiance County ZIP Codes
Ohio, United States · 8 codes
Defiance County in Ohio has 8 ZIP codes, from 43512 to 43556, serving 8 places.
ZIP codes in Defiance
Frequently asked questions
What is the ZIP code of Defiance?
Defiance has 8 ZIP codes, from 43512 to 43556. The table lists the places each one serves.
How many places are listed in Defiance 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.