ZIP Code 99328
Dayton · Columbia, Washington
99328 is the ZIP code of Dayton in Columbia, Washington, United States.
- ZIP Code
- 99328
- County
- Columbia
- State
- Washington
- Country
- United States
Place with ZIP code 99328
| Place | County | Location |
|---|---|---|
| Dayton | Columbia | 46.307, -117.974 |
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 99328?
Dayton.
Which county and state is 99328 in?
Columbia, Washington, United States.
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.