ZIP code 57540: Valley, SD
ZIP code 57540 is in Hyde County, South Dakota, outside any city or Census-designated place. It is in South Dakota's at-large congressional district. Its state senate district is State Senate District 24; its state house district is State House District 24.
See it on the mapAll of South Dakota
City and county
Outside any city or Census-designated place.
| County | Share of ZIP residents |
|---|---|
| Hyde County | 100% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Central Hyde UT | 96% |
| Valley township | 4.4% |
| Crow Creek UT | land only |
Congressional district
| Congressional district | Share of ZIP residents |
|---|---|
| South Dakota's at-large congressional district (SD-AL) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (SD-AL) | Dusty Johnson (R) | 202-225-2801 | 100% |
| U.S. Senator | John Thune (R) | 202-224-2321 · contact form | statewide |
| U.S. Senator | Mike Rounds (R) | 202-224-5842 · contact form | statewide |
| State Senator (State Senate District 24) | Jim Mehlhaff (R) | 100% | |
| State Senator (State Senate District 26) | Tamara Grove (R) | <0.1% | |
| State Representative (State House District 24) | Mike Weisgram (R) | 100% | |
| State Representative (State House District 24) | Will Mortenson (R) | 100% | |
| State Representative (State House District 26B) | Rebecca Reimer (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
- Hyde County laws: search for the Hyde County, South Dakota code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 24 | 100% |
| State Senate District 26 | land only |
| State house district | Share of ZIP residents |
|---|---|
| State House District 24 | 100% |
| State House District 26B | land only |
Voting precincts
2 voting precincts overlap ZIP 57540. 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:57540")
ZIP 57540 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.