ZIP Code 57421 – Amherst, South Dakota | ZipsCode.us
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ZIP Code 57421
Amherst, South Dakota · Marshall
ZIP code 57421 belongs to the city of Amherst in South Dakota (Marshall). See all South Dakota ZIP Codes.
ZIP code 57421 belongs to Amherst, South Dakota, in Marshall. If you are mailing a letter or package to this area, use Amherst, SD 57421 in the address. On this page you will find the city and county for 57421, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.
What City Is ZIP Code 57421?
The city for ZIP code 57421 is Amherst, South Dakota. When you write an address in this area, the correct format is: Name, Street Address, Amherst, SD 57421.
ZIP Code 57421 County and State
ZIP code 57421 is located in Marshall, South Dakota. For a complete list of cities and ZIP codes across the state, see the South Dakota ZIP Codes page.
Nearby ZIP Codes in Marshall
These ZIP codes are in the same county as 57421:
ZIP Code 57421 on the Map
The map below shows the approximate center of ZIP code 57421, near Amherst, South Dakota. You can zoom in and drag the map to explore the area.
Map center is approximate (ZIP area center, around 45.7585, -97.9274). Map data © OpenStreetMap.
Population and Demographics of ZIP Code 57421
According to public U.S. Census Bureau data, ZIP code 57421 is home to a community in South Dakota. The figures below come from the U.S. Census and the American Community Survey (ACS).
Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.
Find an Address in ZIP Code 57421
Need the full ZIP+4 code for a specific street address in Amherst? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.
Frequently Asked Questions
What city is ZIP code 57421?
ZIP code 57421 is for Amherst, South Dakota.
What county is ZIP code 57421 in?
ZIP code 57421 is in Marshall, South Dakota.
What state is ZIP code 57421 in?
ZIP code 57421 is in South Dakota (SD).
How do I find the ZIP+4 for an address in 57421?
Use the free ZIP+4 Lookup tool with the full street address to get the complete 9-digit ZIP code.
What are the nearby ZIP codes to 57421?
Nearby ZIP codes include 57232 (Eden), 57247 (Lake City), 57270 (Veblen), 57430 (Britton), 57454 (Langford).
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