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/OH/UNION

Union ZIP codes, Ohio

No ZIP code is named for Union, OH; addresses there use a neighbouring town's name. 4 ZIP codes cover it: 45371, 45322, 45377 and 45383. Its area code is 937.

USPS city name
0 ZIP codes
Overlapping the city
4 more
Population
7,037
Area code
937
State
Ohio

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

Union in numbers

About 7,037 people live in Union, in 2,848 households. The median household income is $73,353 a year, about the same as the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $169,200 (21% below the Ohio median), and median gross rent is $1,118 a month. The median age is 36.8; 24.0% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 25 minutes.

Population7,037Union7,037
Households2,848Union2,848
Median age36.8Union36.8Ohio39.7US 38.9
Median household income$73,353Union$73,353Ohio$71,389US $80,734
Median home value$169,200Union$169,200Ohio$214,800US $332,700
Median gross rent$1,118Union$1,118Ohio$1,034US $1,413
Bachelor's degree or higher24.0%Union24.0%Ohio31.5%US 35.7%
Mean commute25.0 minUnion25.0 minOhio23.4 minUS 26.4 min
Population density843 / sq miUnion843 / sq mi

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

ZIP codes covering Union

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

ZIP codes overlapping Union
ZIP City Type Population Median income Median home
45322 Englewood , OH Standard 20,884 $75,349 $179,700
45371 Tipp City , OH Standard 22,865 $93,599 $302,300
45377 Vandalia , OH Standard 14,888 $77,398 $202,800
45383 West Milton , OH Standard 6,912 $66,620 $171,800

Map of Union ZIP codes

45322453714537745383

The ZIP codes of Union, OH, 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

The nearest larger towns are Englewood (13,356 people, 3.0 mi), Clayton (13,277 people, 3.1 mi) and Vandalia (15,053 people, 5.7 mi).

Towns near Union
TownPopulationDistance
Englewood 13,356 3.0 mi
Clayton 13,277 3.1 mi
West Milton 4,771 4.0 mi
Vandalia 15,053 5.7 mi
Tipp City 10,439 6.9 mi
Shiloh 10,526 7.1 mi
Fort McKinley 3,508 7.6 mi
Brookville 5,779 8.0 mi
Trotwood 23,041 8.1 mi
Dayton 136,579 9.8 mi
Troy 26,842 10.0 mi
Huber Heights 43,455 10.1 mi
Riverside 24,435 12.4 mi
New Lebanon 4,169 12.4 mi

More nearby: every ZIP code in Montgomery County · Ohio ZIP codes

Cite this page

zipcodes.pro. “Union, OH ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/oh/union

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