Union County ZIP Codes
Tennessee, United States · 3 codes
Union County in Tennessee has 3 ZIP codes, from 37779 to 37866, serving 3 places.
ZIP codes in Union
Frequently asked questions
What is the ZIP code of Union?
Union has 3 ZIP codes, from 37779 to 37866. The table lists the places each one serves.
How many places are listed in Union County?
3 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.