ZIP code 57420 is in Akaska (69% of residents), in Walworth County, South Dakota. 31% of its residents live outside city limits. It is in South Dakota's at-large congressional district. Its state senate district is State Senate District 23; its state house district is State House District 23.
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
1 voting precinct overlap ZIP 57420.
Map them, with each precinct's share of the ZIP's residents.
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ZIP 57420 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code;
PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.