Union County ZIP Codes
Ohio, United States · 9 codes
Union County in Ohio has 9 ZIP codes, from 43007 to 43344, serving 9 places.
ZIP codes in Union
Frequently asked questions
What is the ZIP code of Union?
Union has 9 ZIP codes, from 43007 to 43344. The table lists the places each one serves.
How many places are listed in Union 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.