| Amherst | |
|---|---|
| Unincorporated community | |
| Location within the state of South Dakota | |
| Coordinates: 45°44′17″N 97°55′15″W / 45.73806°N 97.92083°WCoordinates: 45°44′17″N 97°55′15″W / 45.73806°N 97.92083°W | |
| Country | United States |
| State | South Dakota |
| County | Marshall |
| Time zone | Central (CST) (UTC-6) |
| • Summer (DST) | CDT (UTC-5) |
| ZIP codes | 57421 |
Amherst is an unincorporated community in Marshall County, South Dakota, United States. Although not tracked by the Census Bureau, Amherst has been assigned the ZIP code of 57421.
A post office called Amherst was established in 1887. The community most likely takes its name from Amherst, Massachusetts.