ZIP code 57735: Edgemont, SD
ZIP code 57735 is in Edgemont (54% of residents) and Dudley (2.1%), in Fall River County (81%), Custer County (19%) and Sioux County (0.4%), South Dakota. 44% of its residents live outside city limits. It is in South Dakota's at-large congressional district (100%) and Nebraska's 3rd congressional district (0.4%). Its state senate districts are State Senate District 30 (100%) and State Senate District 47 (0.4%); its state house district is State House District 30.
See it on the mapAll of South Dakota
City and county
| City or town | Share of ZIP residents |
|---|---|
| Edgemont | 54% |
| Dudley | 2.1% |
| Provo | 0.7% |
| Ardmore | <0.1% |
| County | Share of ZIP residents |
|---|---|
| Fall River County | 81% |
| Custer County | 19% |
| Sioux County | 0.4% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Edgemont city | 54% |
| Southwest Fall River UT | 22% |
| West Custer UT | 19% |
| Provo township | 2.9% |
| Argentine township | 1.5% |
| Bowen precinct | 0.4% |
| Northeast Fall River UT | 0.4% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| South Dakota's at-large congressional district (SD-AL) | 100% |
| Nebraska's 3rd congressional district (NE-03) | 0.4% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 30 | 100% |
| State Senate District 47 | 0.4% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 30 | 100% |
Voting precincts
7 voting precincts overlap ZIP 57735. It also crosses into NE. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
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:57735")
ZIP 57735 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.