Mattawa Washington ZIP Codes
Mattawa holds a single ZIP code.
Every ZIP code in Mattawa
| ZIP code | County |
|---|---|
| 99349 | Grant 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Mattawa codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Mattawa. 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 Mattawa 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 Mattawa accounts for 3% of it.
Every Washington ZIP prefix and the region it covers →
Area codes covering Mattawa
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 Mattawa occupies.
Mattawa Washington area codes in full →
Where Mattawa's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Mattawa
| City | Distance | ZIP codes |
|---|---|---|
| Royal City Washington ZIP codes | 18 mi | 1 ZIP code |
| George Washington ZIP codes | 24 mi | 1 ZIP code |
| Moxee Washington ZIP codes | 26 mi | 1 ZIP code |
| Zillah Washington ZIP codes | 29 mi | 1 ZIP code |
| Sunnyside Washington ZIP codes | 30 mi | 1 ZIP code |
| Kittitas Washington ZIP codes | 30 mi | 1 ZIP code |
| Granger Washington ZIP codes | 30 mi | 1 ZIP code |
| Selah Washington ZIP codes | 31 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.