ZIP Code 57421 – Amherst, South Dakota
The 57421 ZIP Code belongs to Amherst, South Dakota. The population in this 57421 ZIP code is 75. The latitude is 45.75045 and longitude is -97.90618 in 57421 Amherst, South Dakota. The time zone for this 57421 ZIP code is America/Chicago.
| City | Amherst |
| Zip Code | 57421 |
| State | South Dakota |
| County | Marshall |
| Population | 75 |
| Latitude | 45.75045 |
| Longitude | -97.90618 |
| Time Zone | America/Chicago |