Boundary Atlas

ZIP code 57761: New Underwood, SD

ZIP code 57761 is in New Underwood (50% of residents), in Pennington County (80%) and Meade County (20%), South Dakota. 50% 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 27 (80%) and State Senate District 29 (20%); its state house districts are State House District 27 (80%) and State House District 29 (20%).

1,183residents (2020 Census)
441.1 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
New Underwood50%

CountyShare of ZIP residents
Pennington County80%
Meade County20%

Town or county subdivisionShare of ZIP residents
New Underwood city50%
East Central Pennington UT24%
Belle Fourche-Cheyenne Valleys UT12%
Viewfield township8.1%
Rapid City East UT6.0%
Lakeside township0.2%
Owanka township0.2%

Congressional district

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2780%
State Senate District 2920%

State house districtShare of ZIP residents
State House District 2780%
State House District 2920%

Voting precincts

6 voting precincts overlap ZIP 57761. 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:57761")

ZIP 57761 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.