Union County, OH ZIP codes
There are 9 ZIP codes in Union County, OH, in 8 towns, from 43007 to 43358. The largest are 43040 (Marysville), 43344 (Richwood) and 43358 (West Mansfield). 1 more crosses into it from a neighbouring county: 43064.
The county seat is Marysville.
- ZIP codes
- 9
- Partly in it
- 1 more
- Towns
- 8
- County seat
- Marysville
- County FIPS
39159- State
- Ohio
- Population
- 67,324
- Median household income
- $112,322
- Land area
- 432 sq mi
- Metro area
- Columbus
Union County ZIP codes by town
- Marysville (county seat)
- 43040, 43041
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Union County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Union County.
- 43064 Plain City · mostly in Madison County
Map of Union County ZIP codes
The ZIP codes of Union County, 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.
Union County in numbers
About 67,324 people live in Union County, in 24,232 households, the 36th most populous of Ohio's 88 counties. The median household income is $112,322 a year, 57% above the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $344,900 (61% above the Ohio median), and median gross rent is $1,247 a month. The median age is 38.5; 39.2% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 26 minutes.
| Population | 67,324 |
|---|---|
| Households | 24,232 |
| Median age | 38.5 |
| Median household income | $112,322 |
| Median home value | $344,900 |
| Median gross rent | $1,247 |
| Bachelor's degree or higher | 39.2% |
| Mean commute | 26.0 min |
| Population density | 156 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Union County
| Town | ZIP codes | Population |
|---|---|---|
| Marysville | 2 | 27,518 |
| Richwood | 1 | 2,332 |
| Milford Center | 1 | 770 |
| West Mansfield | 1 | 752 |
| Raymond | 1 | 415 |
| Magnetic Springs | 1 | 359 |
| Unionville Center | 1 | 269 |
| Broadway | 1 | 63 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Union County.
- Franklin County (62)
- Delaware County (10)
- Marion County (10)
- Logan County (13)
- Madison County (7)
- Crawford County (8)
- Champaign County (11)
- Hardin County (10)
Not sure you are in Union County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Union County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
43007 | Broadway , OH | Standard | 63 | — | $180,600 |
43036 | Magnetic Springs , OH | Standard | 359 | $77,813 | $137,500 |
43040 | Marysville , OH | Standard | 38,990 | $99,321 | $311,100 |
43041 | Marysville , OH | No street area | — | — | — |
43045 | Milford Center , OH | Standard | 1,739 | $99,181 | $275,000 |
43067 | Raymond , OH | Standard | 1,884 | $95,903 | $303,100 |
43077 | Unionville Center , OH | Standard | 269 | $104,545 | $182,500 |
43344 | Richwood , OH | Standard | 6,173 | $80,909 | $237,900 |
43358 | West Mansfield , OH | Standard | 2,275 | $89,121 | $218,600 |
Cite this page
zipcodes.pro. “Union County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/oh/county/union
Underlying data is public domain or openly licensed — sources, vintages and licences.