Plymouth County Iowa is covered by a total of 13 ZIP Codes. There are 6 ZIP Codes in Plymouth County that extend into adjacent counties (Cherokee County, Sioux County, Union County, and Woodbury County). Of the ZIP codes within or partially within Plymouth County there are 11 Standard 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 Plymouth 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 | |||
|---|---|---|---|---|---|
| Akron | Standard | |||
| Brunsville | PO Box | |||
| Hinton | Standard | |||
| Ireton | Standard | |||
| Kingsley | Standard | |||
| Le Mars | Standard | |||
| Merrill | Standard | |||
| Oyens | PO Box | |||
| Pierson | Standard | |||
| Remsen | Standard | |||
| Westfield | Standard | |||
| Sioux City | Standard | |||
| Sioux City | Standard |