Sioux County Iowa is covered by a total of 16 ZIP Codes. There are 8 ZIP Codes in Sioux County that extend into adjacent counties (Lyon County, Obrien County, Osceola County, and Plymouth County). Of the ZIP codes within or partially within Sioux County there are 15 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 Sioux 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 | |||
|---|---|---|---|---|---|
| Alton | Standard | |||
| Chatsworth | Standard | |||
| Granville | Standard | |||
| Hawarden | Standard | |||
| Ireton | Standard | |||
| Maurice | Standard | |||
| Orange City | Standard | |||
| Sheldon | Standard | |||
| Ashton | Standard | |||
| Boyden | Standard | |||
| Hospers | Standard | |||
| Hull | Standard | |||
| Inwood | Standard | |||
| Matlock | Standard | |||
| Rock Valley | Standard | |||
| Sioux Center | Standard |