Home > WA > Grant County > Mattawa > Zip 99349

Zip Code 99349 — Mattawa, WA

99349 is a ZIP Code associated with Mattawa, WA, located within Grant. The postal region supports an estimated population of 8,143 residents across Data Pending housing units, with a population density of 11.8 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (46.730780, -119.699600)

Data MetricLocal Statistic
Postal / Zip Code99349
Primary CityMattawa
State / ProvinceWA
CountyGrant
Total Population8,143
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density11.8 people/sq mi
TimezoneAmerica/Los_Angeles

How 99349 Compares

MetricZIP 99349Grant CountyWA State Average
Population8,14397,9187,816,021
Median IncomeData PendingN/AN/A
Population Density11.8 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 99357Royal City11.2 mi3,843N/A
Zip 99321Beverly12.9 mi1,047N/A
Zip 98950Vantage15.8 mi61N/A
Zip 98944Sunnyside16.0 mi22,817N/A
Zip 98824George24.6 mi147N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →