Mattawa, WA ZIP code
The ZIP code for Mattawa, Washington is 99349. It is in Grant County.
- Population in these ZIPs
- 8,143
- Avg. median income
- $61,300population-weighted
- Typical home value
- $440,400population-weighted
- Metro area
- Moses Lake, WA
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Mattawa, WA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 99349 | 8,143 | $61,333 | $440,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Mattawa
Frequently asked questions
What is the ZIP code for Mattawa, WA?
The ZIP code for Mattawa, WA is 99349.
What county is Mattawa, Washington in?
Mattawa ZIP codes are in Grant County.