ZIP code · Mattawa · Washington · United States
ZIP code 99349 — Mattawa
ZIP code 99349 serves Mattawa, Washington.
- Postal code
- 99349Single source Value from one source, not cross-checked.
- City
- Mattawa
- County
- Grant FIPS 53025
- State
- Washington
- Country
- United States
- Coordinates
- 46.7310, -119.7783 — precision precise (locality)
View on OpenStreetMap - Population
- 8,098 (ZCTA, ACS 5-year)
- Population density
- 30 / sq mi
- Land area
- 267.4 sq mi (692.5 km²) (ZCTA, ACS 5-year)
- Median household income
- $62,851
- Per-capita income
- $31,957
- Median age
- 29.5
- Households
- 2,314
- Housing units
- 2,754
- Median home value
- $409,000
- Median gross rent
- $1,181 / month
- Congressional district
- WA-4 (119th Congress)
- USDA hardiness zone
- 7a (0 to 5 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
- Area code
- 509Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 99349 with another ZIP · ZIPs within 25 miles · distance from 99349
Map of ZIP code 99349
Climate — monthly normals
Warmest month Jul (avg high 92°F), coldest Jan (avg low 30°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 41 | 47 | 57 | 65 | 75 | 82 | 92 | 90 | 80 | 65 | 50 | 41 |
| Avg low °F | 30 | 32 | 38 | 45 | 53 | 60 | 67 | 66 | 58 | 46 | 36 | 30 |
| Precip in | 1.1 | 0.6 | 0.7 | 0.6 | 0.6 | 0.5 | 0.2 | 0.1 | 0.1 | 0.7 | 0.9 | 1.4 |
NOAA 1991–2020 climate normals from the nearest station: PRIEST RAPIDS DAM (8.5 mi) · NOAA NCEI
Places in ZIP 99349
- 7 schools
- 1 hospitals & clinics
- 3 supermarkets
- 6 restaurants & cafés
- 1 bars & pubs
- 6 parks
- 6 playgrounds
- 2 gyms & sports centres
- 1 libraries
- 1 post offices
- 6 places of worship
- 1 banks
- 3 gas stations
- 1 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page