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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/WA/MATTAWA

Mattawa ZIP code, Washington

The ZIP code for Mattawa, WA is 99349, and its area code is 509.

USPS city name
1 ZIP code
Population
3,616
Area code
509

Mattawa in numbers

About 3,616 people live in Mattawa, in 935 households. The median household income is $38,388 a year, 61% below the Washington median of $98,141 (US: $80,734). Median gross rent is $1,128 a month. The median age is 21.7; 0.2% of adults 25 and over hold a bachelor's degree or higher (39.6% across Washington); the average commute takes 26 minutes.

Population3,616Mattawa3,616
Households935Mattawa935
Median age21.7Mattawa21.7Washington38.3US 38.9
Median household income$38,388Mattawa$38,388Washington$98,141US $80,734
Median gross rent$1,128Mattawa$1,128Washington$1,760US $1,413
Bachelor's degree or higher0.2%Mattawa0.2%Washington39.6%US 35.7%
Mean commute25.7 minMattawa25.7 minWashington26.6 minUS 26.4 min
Population density3,612 / sq miMattawa3,612 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Mattawa city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Mattawa

ZIP codes with the USPS city name Mattawa
ZIP City Type Population Median income Median home
99349 Mattawa , WA Standard 8,143 $61,333 $427,800

Map of Mattawa ZIP codes

99349

The ZIP codes of Mattawa, WA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Mattawa

The nearest larger towns are Moxee (4,625 people, 26 mi), Terrace Heights (10,041 people, 27 mi) and Sunnyside (16,277 people, 29 mi).

Towns near Mattawa
TownPopulationDistance
Desert Aire 2,788 3.1 mi
Moxee 4,625 26.2 mi
Terrace Heights 10,041 26.9 mi
Zillah 3,140 28.6 mi
Sunnyside 16,277 29.5 mi

More nearby: every ZIP code in Grant County · Washington ZIP codes

Cite this page

zipcodes.pro. “Mattawa, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/mattawa

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