Home > WA > Grant County > Mattawa > Zip 99349

Zip Code 99349 — Mattawa, WA

ZIP Code 99349 is associated with Mattawa, WA, in Grant County. The listed population estimate is 8,143; estimated density is 11.8 people per square mile. Among records with population estimates, it ranks #4 of 14 in Grant County and #251 of 597 in WA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (46.730780, -119.699600)

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

How 99349 Compares

MetricZIP 99349Grant County recordsWA records
Population estimate8,14397,918 (sum)7,816,021 (sum)
Population Density11.8 /sq mi----
County population rank#4 of 14----
State population rank#251 of 597----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in WA

ZIP CodeCityDistancePopulation estimate
ZIP 99357Royal City11.2 mi3,843
ZIP 99321Beverly12.9 mi1,047
ZIP 98950Vantage15.8 mi61
ZIP 98944Sunnyside16.0 mi22,817
ZIP 98824George24.6 mi147

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 →