In which county is ZIP code 99346 located?

ZIP 99346 is listed under Benton County, WA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 99346: Plymouth, WA

ZIP: 99346

County: Benton County

Coordinates: 45.93010, -119.40230

ZIP Type: Standard

Time Zone: Pacific Time (PT)

Get a reliable snapshot of the Plymouth, WA postal area 99346. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Plymouth
ZIP Code	99346
County	Benton County
State	WA
Latitude / Longitude	45.93010, -119.40230
ZIP Type	Standard
Time Zone	Pacific Time (PT)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 99346 (not an exact boundary).

Geographic & Administrative Context

The geographic center of ZIP code 99346 is approximately 45.93010 (latitude) and -119.40230 (longitude). This location sits within Benton County, contributing to regional planning across WA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 99346 for mail delivery and general location reference in Benton County, WA.

Some addresses near Plymouth may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Plymouth within WA.

Frequently Asked Questions

What is the primary city for ZIP code 99346?

The primary city for this ZIP code is Plymouth, located in WA.

In which county is 99346 located?

ZIP code 99346 is situated within Benton County, WA.

What are the coordinates for 99346?

The approximate center point is 45.93010 (Latitude) and -119.40230 (Longitude).

Is ZIP code 99346 active?

This page lists ZIP 99346 as Listed based on the latest refresh date shown above.

Does ZIP 99346 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08