Columbia County ZIP Codes
Washington, United States · 2 codes
Columbia County in Washington has 2 ZIP codes, from 99328 to 99359, serving 2 places.
ZIP codes in Columbia
Frequently asked questions
What is the ZIP code of Columbia?
Columbia has 2 ZIP codes, from 99328 to 99359. The table lists the places each one serves.
How many places are listed in Columbia County?
2 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.