Amherst zip code
Zip code in Amherst, SD
The location Amherst belongs to Marshall County, state of South Dakota. Amherst has been assigned with the zip code 57421.
Amherst 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 |
|---|---|---|
| 57421 | STANDARD | 88 |
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