Union County Ohio is covered by a total of 17 ZIP Codes. There are 13 ZIP Codes in Union County that extend into adjacent counties (Champaign County, Crawford County, Delaware County, Franklin County, Hardin County, Logan County, Madison County, and Marion County). Of the ZIP codes within or partially within Union County there are 13 Standard ZIP Codes, 1 Unique ZIP Codes and 2 PO Box ZIP Codes.
Click on the ZIP Codes in the interactive map to view more information. The map control in the upper right corner can be used to toggle map layers on and off. The red outline is the border of Union County and can be turned on and off. Each type of postal code can also be turned on and off.
| ZIP Code | ZIP Code City/Town | ZIP Code Type | |||
|---|---|---|---|---|---|
| Broadway | PO Box | |||
| Dublin | Standard | |||
| Irwin | Standard | |||
| Magnetic Springs | PO Box | |||
| Marysville | Standard | |||
| Marysville | Unique | |||
| Milford Center | Standard | |||
| North Lewisburg | Standard | |||
| Ostrander | Standard | |||
| Plain City | Standard | |||
| Raymond | Standard | |||
| Unionville Center | PO Box | |||
| Woodstock | Standard | |||
| Marion | Standard | |||
| Mount Victory | Standard | |||
| Richwood | Standard | |||
| West Mansfield | Standard |