Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/UNION-GAP

Union Gap ZIP codes, Washington

No ZIP code is named for Union Gap, WA; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 98901 and 98903. Its area code is 509.

USPS city name
0 ZIP codes
Overlapping the city
2 more
Population
6,584
Area code
509

NANPA lists no telephone rate centre for Union Gap itself, so these are the area codes of the nearest one, Yakima (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Union Gap in numbers

About 6,584 people live in Union Gap, in 2,242 households. The median household income is $59,651 a year, 39% below the Washington median of $98,141 (US: $80,734). The median owner-occupied home is valued at $210,600 (63% below the Washington median), and median gross rent is $1,133 a month. The median age is 34.5; 4.4% of adults 25 and over hold a bachelor's degree or higher (39.6% across Washington); the average commute takes 16 minutes.

Population6,584Union Gap6,584
Households2,242Union Gap2,242
Median age34.5Union Gap34.5Washington38.3US 38.9
Median household income$59,651Union Gap$59,651Washington$98,141US $80,734
Median home value$210,600Union Gap$210,600Washington$564,600US $332,700
Median gross rent$1,133Union Gap$1,133Washington$1,760US $1,413
Bachelor's degree or higher4.4%Union Gap4.4%Washington39.6%US 35.7%
Mean commute16.2 minUnion Gap16.2 minWashington26.6 minUS 26.4 min
Population density1,181 / sq miUnion Gap1,181 / sq mi

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

ZIP codes covering Union Gap

These ZIP codes cover part of Union Gap but are addressed as somewhere else.

ZIP codes overlapping Union Gap
ZIP City Type Population Median income Median home
98901 Yakima , WA Standard 31,366 $57,392 $279,600
98903 Yakima , WA Standard 19,445 $75,343 $287,400

Map of Union Gap ZIP codes

9890198903

The ZIP codes of Union Gap, 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 Union Gap

The nearest larger towns are Yakima (96,961 people, 3.7 mi), Terrace Heights (10,041 people, 4.1 mi) and Selah (8,437 people, 6.7 mi).

Towns near Union Gap
TownPopulationDistance
Yakima 96,961 3.7 mi
Terrace Heights 10,041 4.1 mi
Moxee 4,625 4.6 mi
Ahtanum 3,777 5.8 mi
Selah 8,437 6.7 mi
Wapato 4,538 8.4 mi
Gleed 2,844 8.9 mi
Zillah 3,140 14.5 mi
Toppenish 8,723 14.8 mi
Granger 3,705 20.3 mi
Desert Aire 2,788 28.4 mi
Sunnyside 16,277 28.4 mi

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

Cite this page

zipcodes.pro. “Union Gap, WA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wa/union-gap

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