Mattawa is a city in Grant County, Washington, home to about 3,616 people across 0.9 square miles. Its ZIP code is 99349.
Homes sold for a median of $383 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Mattawa; also Desert Aire
Each card is that ZIP code’s whole market, including any part outside Mattawa. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Mattawa’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Spokane International Airport (GEG)122 miles away |
|---|---|
| Closer regional airport | Tri Cities Airport (PSC)45 miles away |
| Nearest city of 250,000+ | Seattle, WA135 miles away |
Straight-line distances from the center of Mattawa; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Mattawa had 3,335 residents in the 2020 census, up 28% since 2000.
It’s the 233rd largest of 628 towns in Washington by population.
Grant County grew from 8,698 residents in 1910 to 99,123 in 2020.
Grant County, 1910–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 92°F in summer, and winter lows average 30°F. About 7.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Priest Rapids Dam, WA weather station (8 miles away).
24,839 jobs at 2,123 businesses in Grant County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
21 doctors and other health care providers list an office in Mattawa.
Nearest hospitals
Providers with an office here
| Primary care doctors | 1 |
|---|---|
| Dentists | 1 |
| Nurse practitioners and physician assistants | 14 |
| Mental health providers | 4 |
| Optometrists | 1 |
| Pharmacies | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Established in 1909.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Wahluke School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Developmental Pre-SchoolMattawa | Pre-K | 10 | Special Education | 5.7 mi |
| Mattawa Elementary Pre-SchoolMattawa | Pre-K | 119 | Public | 5.7 mi |
| Mattawa ElementaryMattawa | K | 199 | Public | 5.7 mi |
| Saddle Mountain ElementaryMattawa | 1–3 | 470 | Public | 5.8 mi |
| Morris Schott ElementaryMattawa | 4–5 | 317 | Public | 5.7 mi |
| Sentinel Tech Alt SchoolMattawa | 6–12 | 36 | Alternative Education | 6.8 mi |
| Wahluke Junior HighMattawa | 6–8 | 554 | Public | 5.7 mi |
| Wahluke High SchoolMattawa | 9–12 | 750 | Public | 5.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Desert Aire.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.