| ZIP Code | 57421 |
| City | Amherst |
| State | South Dakota (SD) |
| County | Marshall |
| Timezone | America/Chicago |
| Coordinates | 45.7504500, -97.9061800 |
| Population | 75 |
| ZIP Type | STANDARD |
| Country | United States |
57421 is a sparsely populated ZIP code covering Amherst in South Dakota, the United States. This area falls under Marshall County.
Census data puts the population of this ZIP code at 75 residents. It's a quieter, less populous area than the typical South Dakota ZIP code (avg. ~2,435).
Nearby communities in South Dakota include Sioux Falls, Rapid City.
The ZIP code for Amherst, South Dakota is 57421.
57421 is located in Marshall County, South Dakota.
The population of 57421 (Amherst) is approximately 75 people.
57421 is less populated than the typical South Dakota ZIP code, which averages around 2,435 people.
ZIP code codes near 57421 include 57106, 57701, 57702.