57421 Frequently Asked Questions

A: ZIP Code 57421 is Located in Amherst South Dakota. Portions of 57421 are also in Newport Colony, Weston Township, Stena Township.

A: ZIP Code 57421 is Located Entirely in Marshall County South Dakota.

A: The Current Sales Tax in ZIP Code 57421 is 4.2%

A: The Area Code for 57421 is 605.

A: ZIP Code 57421 is in South Dakota State House of Representatives District 1.

A: ZIP Code 57421 is in South Dakota State Senate District 1.

A: The 2022 population of ZIP Code 57421 is 54. The population growth rate in 57421 is 35.21%. The population density of 57421 is 2.

A: The majority race/ethnicity of people residing in 57421 is White (100.00%).