ZIP code 58439: Spring Creek Colony, SD
ZIP code 58439 is in Spring Creek Colony (56% of residents) and Forbes (8.7%), in McPherson County (66%), Dickey County (32%) and Brown County (2.7%), South Dakota. 36% of its residents live outside city limits. It is in South Dakota's at-large congressional district (68%) and North Dakota's at-large congressional district (32%). Its state senate districts are State Senate District 23 (66%), State Senate District 28 (32%) and State Senate District 1 (2.7%); its state house districts are State House District 23 (66%), State House District 28 (32%) and State House District 1 (2.7%).
See it on the mapAll of South Dakota
City and county
| City or town | Share of ZIP residents |
|---|---|
| Spring Creek Colony | 56% |
| Forbes | 8.7% |
| County | Share of ZIP residents |
|---|---|
| McPherson County | 66% |
| Dickey County | 32% |
| Brown County | 2.7% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| Weber township | 59% |
| Forbes city | 8.7% |
| Lorraine township | 8.5% |
| Grand Valley township | 7.5% |
| Wachter township | 5.8% |
| Elm township | 2.9% |
| Palmyra township | 2.7% |
| Albertha township | 1.7% |
| Spring Valley township | 1.5% |
| Albion township | 0.7% |
| Carl township | 0.7% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| South Dakota's at-large congressional district (SD-AL) | 68% |
| North Dakota's at-large congressional district (ND-AL) | 32% |
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.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (SD-AL) | Dusty Johnson (R) | 202-225-2801 | 68% |
| U.S. Representative (ND-AL) | Julie Fedorchak (R) | 202-225-2611 | 32% |
| 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 23) | Mark Lapka (R) | 66% | |
| State Senator (State Senate District 28) | Robert Erbele (R) | 32% | |
| State Senator (State Senate District 1) | Michael Rohl (R) | 2.7% | |
| State Representative (State House District 23) | Scott Moore (R) | 66% | |
| State Representative (State House District 23) | Spencer Gosch (R) | 66% | |
| State Representative (State House District 28) | Jim Grueneich (R) | 32% | |
| State Representative (State House District 28) | Mike Brandenburg (R) | 32% | |
| State Representative (State House District 1) | Logan Manhart (R) | 2.7% | |
| State Representative (State House District 1) | Nick Fosness (R) | 2.7% |
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
- Spring Creek Colony laws: search for the Spring Creek Colony, South Dakota code of ordinances
- Forbes laws: search for the Forbes, South Dakota code of ordinances
- McPherson County website: http://mcpherson.sdcounties.org
- McPherson County laws: search for the McPherson County, South Dakota code of ordinances
- Dickey County website: http://www.dickeynd.com
- Dickey County laws: search for the Dickey County, South Dakota code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 23 | 66% |
| State Senate District 28 | 32% |
| State Senate District 1 | 2.7% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 23 | 66% |
| State House District 28 | 32% |
| State House District 1 | 2.7% |
Voting precincts
3 voting precincts overlap ZIP 58439. It also crosses into ND. 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:58439")
ZIP 58439 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.