Amherst is a census-designated place (CDP) and a post office located in Phillips County, Colorado, United States.

[2] As of the United States Census 2020, the population of the Amherst CDP was 47.

[3] The community was named after Amherst, Massachusetts, the native home of a local businessman.

[7] The Amherst Post Office opened on February 18, 1888.

[9] The Amherst CDP has an area of 291 acres (1.176 km2), all land.