Boundary Atlas

ZIP code 57075: Lake Madison, SD

ZIP code 57075 is in Lake Madison (44% of residents) and Wentworth (16%), in Lake County (100%) and Moody County (<0.1%), South Dakota. 41% of its residents live outside city limits. It is in South Dakota's at-large congressional district. Its state senate districts are State Senate District 8 (100%) and State Senate District 25 (<0.1%); its state house districts are State House District 8 (100%) and State House District 25 (<0.1%).

1,168residents (2020 Census)
79.9 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
Lake Madison44%
Wentworth16%

CountyShare of ZIP residents
Lake County100%
Moody County<0.1%

Town or county subdivisionShare of ZIP residents
Wentworth township45%
Lake View township22%
Wentworth village16%
Rutland township8.6%
Chester township6.5%
Le Roy township2.3%
Franklin township0.4%
Jefferson township<0.1%

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 8)Casey Crabtree (R)100%
State Senator (State Senate District 25)Tom Pischke (R)<0.1%
State Representative (State House District 8)Tim Reisch (R)100%
State Representative (State House District 8)Tim Walburg (R)100%
State Representative (State House District 25)Jon Hansen (R)<0.1%
State Representative (State House District 25)Les Heinemann (R)<0.1%

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 8100%
State Senate District 25<0.1%

State house districtShare of ZIP residents
State House District 8100%
State House District 25<0.1%

Voting precincts

5 voting precincts overlap ZIP 57075. 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:

related_geographies(id="us:zcta:57075")

ZIP 57075 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.