Benton County ZIP Codes
Washington, United States · 10 codes
Benton County in Washington has 10 ZIP codes, from 99320 to 99354, serving 10 places.
ZIP codes in Benton
Frequently asked questions
What is the ZIP code of Benton?
Benton has 10 ZIP codes, from 99320 to 99354. The table lists the places each one serves.
How many places are listed in Benton County?
10 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.