Boundary Atlas

ZIP code 57271: Vienna, SD

ZIP code 57271 is in Vienna (26% of residents) and Naples (20%), in Clark County (79%) and Hamlin County (21%), South Dakota. 54% 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 4; its state house district is State House District 4.

188residents (2020 Census)
63.8 sq miland area
2cities and towns
1congressional district
5voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Vienna26%
Naples20%

CountyShare of ZIP residents
Clark County79%
Hamlin County21%

Town or county subdivisionShare of ZIP residents
Vienna town26%
Naples town20%
Foxton township18%
Dixon township12%
Merton township11%
Brantford township9.0%
Elrod township2.7%
Pleasant township1.6%

Congressional district

Congressional districtShare of ZIP residents
South Dakota's at-large congressional district (SD-AL)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (SD-AL)Dusty Johnson (R)202-225-2801100%
U.S. SenatorJohn Thune (R)202-224-2321 · contact formstatewide
U.S. SenatorMike Rounds (R)202-224-5842 · contact formstatewide
State Senator (State Senate District 4)Stephanie Sauder (R)100%
State Representative (State House District 4)Dylan Jordan (R)100%
State Representative (State House District 4)Kent Roe (R)100%

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).

Local government

State legislative districts

State senate districtShare of ZIP residents
State Senate District 4100%

State house districtShare of ZIP residents
State House District 4100%

Voting precincts

5 voting precincts overlap ZIP 57271. Map them, with each precinct's share of the ZIP's residents.

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Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

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ZIP 57271 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.