Howard County Iowa is covered by a total of 10 ZIP Codes. There are 7 ZIP Codes in Howard County that extend into adjacent counties (Chickasaw County, Mitchell County, and Winneshiek County). Of the ZIP codes within or partially within Howard County there are 8 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 Howard 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 | |||
|---|---|---|---|---|---|
| Riceville | Standard | |||
| Alta Vista | Standard | |||
| Elma | Standard | |||
| New Hampton | Standard | |||
| Calmar | Standard | |||
| Chester | Standard | |||
| Cresco | Standard | |||
| Lawler | Standard | |||
| Lime Springs | Standard | |||
| Protivin | PO Box |