ZIP CodesZIP codes in Union County, Ohio
Union County, Ohio has 9 ZIP codes in this list, from 43007 to 43344. They cover 8 places, among them Marysville, Broadway, Irwin and Magnetic Springs.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 43007 | Broadway | 2.4 | 40.341, -83.416 |
| 43029 | Irwin | 23.4 | 40.128, -83.459 |
| 43036 | Magnetic Springs | 0.2 | 40.353, -83.263 |
| 43040 | Marysville | 166 | 40.248, -83.362 |
| 43041 | Marysville | no area | 40.236, -83.367 |
| 43045 | Milford Center | 37.6 | 40.182, -83.437 |
| 43067 | Raymond | 32.8 | 40.338, -83.466 |
| 43077 | Unionville Center | 0.2 | 40.137, -83.341 |
| 43344 | Richwood | 98.0 | 40.437, -83.314 |
The ZIP code areas of Union County add up to about 361 square miles of land (934 sq km) as the Census Bureau draws them. The largest is 43040 (Marysville), with 166 square miles.
Places with more than one code here: Marysville (2 codes).
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Broadway, OH 43007.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.