Grant County Oregon is covered by a total of 12 ZIP Codes. There are 3 ZIP Codes in Grant County that extend into adjacent counties (Baker County, Umatilla County, and Union County). Of the ZIP codes within or partially within Grant County there are 10 Standard ZIP Codes and 1 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 Grant 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 | |||
|---|---|---|---|---|---|
| Bates | Standard | |||
| Canyon City | Standard | |||
| Dayville | Standard | |||
| John Day | Standard | |||
| Kimberly | Standard | |||
| Long Creek | Standard | |||
| Monument | Standard | |||
| Mount Vernon | Standard | |||
| Prairie City | Standard | |||
| Seneca | Standard | |||
| Sumpter | Standard | |||
| Ukiah | PO Box |