Polk County Iowa is covered by a total of 85 ZIP Codes. There are 15 ZIP Codes in Polk County that extend into adjacent counties (Boone County, Dallas County, Jasper County, Marion County, Story County, and Warren County). Of the ZIP codes within or partially within Polk County there are 41 Standard ZIP Codes, 29 Unique ZIP Codes and 14 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 Polk County and can be turned on and off. Each type of postal code can also be turned on and off.