Neptune zip code
Zip code in Neptune, IA
The location Neptune belongs to Plymouth County, state of Iowa. Neptune has been assigned with the zip code 51024.
The location name Neptune is listed as unacceptable by the US Postal Service so any mailing should avoid it. Instead you can use Hinton, the official name of the location.
| Zip code | Type | Population |
|---|---|---|
| 51024 | STANDARD | 1,940 |
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