ZIP code 57534 is in Hamill (7.4% of residents), in Tripp County (88%) and Lyman County (12%), South Dakota. 93% 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 21 (88%) and State Senate District 26 (12%); its state house districts are State House District 21 (88%) and State House District 26B (12%).
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).
4 voting precincts overlap ZIP 57534.
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:57534")
ZIP 57534 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.