Gilliam County ZIP Codes
Oregon, United States · 3 codes
Gilliam County in Oregon has 3 ZIP codes, from 97812 to 97861, serving 3 places.
ZIP codes in Gilliam
Frequently asked questions
What is the ZIP code of Gilliam?
Gilliam has 3 ZIP codes, from 97812 to 97861. The table lists the places each one serves.
How many places are listed in Gilliam 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.