ZIP code 57717: Belle Fourche, SD
ZIP code 57717 is in Belle Fourche (68% of residents), in Butte County (98%), Crook County (0.8%), Lawrence County (0.5%), Carter County (0.4%) and Harding County (0.3%), South Dakota. 32% of its residents live outside city limits. It is in South Dakota's at-large congressional district (99%), Wyoming's at-large congressional district (0.8%) and Montana's 2nd congressional district (0.4%). Its state senate districts are State Senate District 28 (98%), State Senate District 1 (0.8%), State Senate District 31 (0.5%) and State Senate District 17 (0.4%); its state house districts are State House District 28B (98%), State House District 1 (0.8%), State House District 31 (0.5%) and State House District 34 (0.4%).
See it on the mapAll of South Dakota
City and county
| City or town | Share of ZIP residents |
|---|---|
| Belle Fourche | 68% |
| Fruitdale | 0.9% |
| County | Share of ZIP residents |
|---|---|
| Butte County | 98% |
| Crook County | 0.8% |
| Lawrence County | 0.5% |
| Carter County | 0.4% |
| Harding County | 0.3% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Belle Fourche city | 68% |
| West Butte UT | 29% |
| Fruitdale town | 0.9% |
| Hulett CCD | 0.8% |
| North Lawrence UT | 0.5% |
| Alzada-Boyes CCD | 0.4% |
| South Harding UT | 0.3% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| South Dakota's at-large congressional district (SD-AL) | 99% |
| Wyoming's at-large congressional district (WY-AL) | 0.8% |
| Montana's 2nd congressional district (MT-02) | 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 28 | 98% |
| State Senate District 1 | 0.8% |
| State Senate District 31 | 0.5% |
| State Senate District 17 | 0.4% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 28B | 98% |
| State House District 1 | 0.8% |
| State House District 31 | 0.5% |
| State House District 34 | 0.4% |
Voting precincts
19 voting precincts overlap ZIP 57717. It also crosses into MT and WY. 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:57717")
ZIP 57717 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.