Amherst is an unincorporated community in Marshall County, South Dakota, United States.

A post office called Amherst was established in 1887.

[3] Approximately two and half miles southeast of the village a rupture of the Keystone Pipeline caused what is being called the largest oil spill in South Dakota history on November 16, 2017.

[4] The spill is an area about 100 yards in radius within a conservation reserve field about a mile east of 416 Avenue south of the village.

This South Dakota state location article is a stub.