Dubuque County Iowa ZIP Codes - Map and Full List

Dubuque County Iowa is covered by a total of 21 ZIP Codes. There are 11 ZIP Codes in Dubuque County that extend into adjacent counties (Clayton County, Delaware County, Jackson County, and Jones County). Of the ZIP codes within or partially within Dubuque County there are 18 Standard ZIP Codes, 1 Unique ZIP Codes and 2 PO Box ZIP Codes.

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Dubuque County Iowa ZIP Code Map

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 Dubuque County and can be turned on and off. Each type of postal code can also be turned on and off.

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