In which county is ZIP code 99350 located?

ZIP 99350 is listed under Benton County, WA.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 99350: Prosser, WA

ZIP: 99350

County: Benton County

Coordinates: 46.22320, -119.77100

ZIP Type: Standard

Time Zone: Pacific Time (PT)

Explore detailed information for ZIP code 99350 in Prosser, WA. We include verified county details for Benton County plus key geographic references used for mapping and logistics.

Primary City	Prosser
ZIP Code	99350
County	Benton County
State	WA
Latitude / Longitude	46.22320, -119.77100
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 99350 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 99350 are listed as 46.22320 / -119.77100, useful for GPS and service checks in and around Prosser, WA.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 99350 for mail delivery and general location reference in Benton County, WA.

Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Prosser.

Related ZIP Codes (Nearby)

Explore other postal codes near Prosser within WA.

Frequently Asked Questions

What is the primary city for ZIP code 99350?

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

In which county is 99350 located?

ZIP code 99350 is situated within Benton County, WA.

What are the coordinates for 99350?

The approximate center point is 46.22320 (Latitude) and -119.77100 (Longitude).

Is ZIP code 99350 active?

This page lists ZIP 99350 as Listed based on the latest refresh date shown above.

Does ZIP 99350 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