Walnut zip code
Zip code in Walnut, IA
The location Walnut belongs to Pottawattamie County, state of Iowa. Walnut has been assigned with the zip code 51577.
Walnut is the official name of the location so if you want to use the US Postal Service you must use that name.
| Zip code | Type | Population |
|---|---|---|
| 51577 | STANDARD | 960 |
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