Buchanan County Iowa is covered by a total of 14 ZIP Codes. There are 9 ZIP Codes in Buchanan County that extend into adjacent counties (Benton County, Black Hawk County, Bremer County, Delaware County, Fayette County, and Linn County). Of the ZIP codes within or partially within Buchanan County there are 13 Standard 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 Buchanan 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 | |||
|---|---|---|---|---|---|
| Aurora | Standard | |||
| Fairbank | Standard | |||
| Hazleton | Standard | |||
| Independence | Standard | |||
| Jesup | Standard | |||
| Lamont | Standard | |||
| Masonville | Standard | |||
| Stanley | Standard | |||
| Winthrop | Standard | |||
| Brandon | Standard | |||
| Coggon | Standard | |||
| Quasqueton | Standard | |||
| Rowley | Standard | |||
| Walker | Standard |