Prosser Washington ZIP Codes
Prosser holds a single ZIP code.
Every ZIP code in Prosser
| ZIP code | County |
|---|---|
| 99350 | Benton County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Prosser codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Prosser. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Prosser ZIP code begins 993. Those first three digits identify the sectional center facility that processes mail for this part of Washington. Statewide that range covers 36 ZIP codes, so Prosser accounts for 3% of it.
Every Washington ZIP prefix and the region it covers →
Area codes covering Prosser
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Prosser occupies.
Prosser Washington area codes in full →
Where Prosser's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Prosser
| City | Distance | ZIP codes |
|---|---|---|
| Grandview Washington ZIP codes | 7.2 mi | 1 ZIP code |
| Mabton Washington ZIP codes | 11 mi | 1 ZIP code |
| Sunnyside Washington ZIP codes | 14 mi | 1 ZIP code |
| Benton City Washington ZIP codes | 14 mi | 1 ZIP code |
| West Richland Washington ZIP codes | 20 mi | 1 ZIP code |
| Granger Washington ZIP codes | 22 mi | 1 ZIP code |
| Richland Washington ZIP codes | 23 mi | 2 ZIP codes |
| Zillah Washington ZIP codes | 28 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.