Union is a city in Montgomery County, Ohio, home to about 7,037 people across 8.3 square miles. It has no ZIP code of its own: it’s part of 45322, 45377 and 45383.
Homes sold for a median of $161 per square foot across 3 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Mostly Englewood; part is in Union
Mostly Dayton; part is in Union
Mostly West Milton; part is in Union
Each card is that ZIP code’s whole market, including any part outside Union. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Union’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Cincinnati Northern Kentucky International Airport (CVG)61 miles away |
|---|---|
| Closer regional airport | James M. Cox Dayton International Airport (DAY)3 miles away |
| Nearest city of 250,000+ | Cincinnati, OH53 miles away |
| Nearest city of 1 million+ | Chicago, IL223 miles away |
Straight-line distances from the center of Union; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Union had 6,859 residents in the 2020 census, up 23% since 2000.
It’s the 238th largest of 1,264 towns in Ohio by population.
Montgomery County grew from 130,146 residents in 1900 to 537,309 in 2020.
Montgomery County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 86°F in summer, and winter lows average 22°F. About 41.6 inches of rain and melted snow fall in a typical year, with about 25 inches of snow.
Source: NOAA 1991–2020 climate normals, Dayton Intl Ap, OH weather station (3 miles away).
234,881 jobs at 10,930 businesses in Montgomery County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
266 doctors and other health care providers list an office in Union’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 36 |
|---|---|
| Specialist doctors | 12 |
| Dentists | 24 |
| Nurse practitioners and physician assistants | 71 |
| Mental health providers | 73 |
| Physical and occupational therapists | 33 |
| Optometrists | 7 |
| Chiropractors | 10 |
| Pharmacies | 8 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (6 nearby)
Grocery stores (2 nearby)
Pharmacies
Libraries
Museums (2 nearby)
Counts are within about 2 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1806.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Vandalia-Butler City, Milton-Union Exempted Village, Northmont City. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Helke Early Learning CenterVandalia | Pre-K–K | 310 | Public | 3.1 mi |
| Milton-Union Elementary SchoolWest Milton | K–5 | 656 | Public | 6.7 mi |
| Demmitt Elementary SchoolVandalia | 1–2 | 373 | Public | 5.2 mi |
| Englewood Hills Elementary SchoolEnglewood | 2–6 | 369 | Public | 2.3 mi |
| Northmoor Elementary SchoolEnglewood | 2–6 | 458 | Public | 2.8 mi |
| Union Elementary SchoolUnion | 2–6 | 539 | Public | 2.5 mi |
| Milton-Union Middle SchoolWest Milton | 6–8 | 321 | Public | 6.7 mi |
| Morton Middle SchoolVandalia | 6–8 | 699 | Public | 2.6 mi |
| Butler High SchoolVandalia | 9–12 | 856 | Public | 4.0 mi |
| Milton-Union High SchoolWest Milton | 9–12 | 369 | Public | 6.7 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| St ChristopherVandalia | K–8 | 295 | Roman Catholic | 4.4 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Dayton, Vandalia, Englewood, Clayton and West Milton.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.