Grant County ZIP Codes
Washington, United States · 16 codes
Grant County in Washington has 16 ZIP codes, from 98823 to 99357, serving 16 places.
ZIP codes in Grant
Frequently asked questions
What is the ZIP code of Grant?
Grant has 16 ZIP codes, from 98823 to 99357. The table lists the places each one serves.
How many places are listed in Grant County?
16 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.