Calhoun County Iowa is covered by a total of 12 ZIP Codes. There are 7 ZIP Codes in Calhoun County that extend into adjacent counties (Carroll County, Pocahontas County, Sac County, and Webster County). Of the ZIP codes within or partially within Calhoun 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 Calhoun 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 | |||
|---|---|---|---|---|---|
| Farnhamville | Standard | |||
| Fonda | Standard | |||
| Jolley | Standard | |||
| Knierim | PO Box | |||
| Lytton | Standard | |||
| Manson | Standard | |||
| Pomeroy | Standard | |||
| Rockwell City | Standard | |||
| Somers | Standard | |||
| Auburn | Standard | |||
| Lake City | Standard | |||
| Lohrville | Standard |