ZIP code 57255: New Effington, SD
ZIP code 57255 is in New Effington (48% of residents), in Roberts County (98%) and Richland County (1.8%), South Dakota. 52% of its residents live outside city limits. It is in South Dakota's at-large congressional district (98%) and North Dakota's at-large congressional district (1.8%). Its state senate districts are State Senate District 1 (98%) and State Senate District 25 (1.8%); its state house districts are State House District 1 (98%) and State House District 25 (1.8%).
See it on the mapAll of South Dakota
City and county
| City or town | Share of ZIP residents |
|---|---|
| New Effington | 48% |
| County | Share of ZIP residents |
|---|---|
| Roberts County | 98% |
| Richland County | 1.8% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| New Effington town | 48% |
| Lien township | 24% |
| Minnesota township | 10% |
| Hart township | 10% |
| Harmon township | 2.7% |
| Victor township | 2.7% |
| Duerr township | 1.8% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| South Dakota's at-large congressional district (SD-AL) | 98% |
| North Dakota's at-large congressional district (ND-AL) | 1.8% |
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 | 98% |
| U.S. Representative (ND-AL) | Julie Fedorchak (R) | 202-225-2611 | 1.8% |
| 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 1) | Michael Rohl (R) | 98% | |
| State Senator (State Senate District 25) | Larry Luick (R) | 1.8% | |
| State Representative (State House District 1) | Logan Manhart (R) | 98% | |
| State Representative (State House District 1) | Nick Fosness (R) | 98% | |
| State Representative (State House District 25) | Alisa Mitskog (Democratic) | 1.8% | |
| State Representative (State House District 25) | Kathy Skroch (R) | 1.8% |
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
- New Effington laws: search for the New Effington, South Dakota code of ordinances
- Roberts County website: http://roberts.sdcounties.org
- Roberts County laws: search for the Roberts County, South Dakota code of ordinances
- Richland County laws: search for the Richland County, South Dakota code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 1 | 98% |
| State Senate District 25 | 1.8% |
| State house district | Share of ZIP residents |
|---|---|
| State House District 1 | 98% |
| State House District 25 | 1.8% |
Voting precincts
5 voting precincts overlap ZIP 57255. 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:57255")
ZIP 57255 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.