Boundary Atlas

ZIP code 57256: Ortley, SD

ZIP code 57256 is in Ortley (28% of residents), in Grant County (52%), Roberts County (45%), Codington County (3.0%) and Day County (<0.1%), South Dakota. 72% 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 4 (55%) and State Senate District 1 (45%); its state house districts are State House District 4 (55%) and State House District 1 (45%).

166residents (2020 Census)
44.4 sq miland area
1cities and towns
1congressional district
4voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Ortley28%

CountyShare of ZIP residents
Grant County52%
Roberts County45%
Codington County3.0%
Day Countyland only

Town or county subdivisionShare of ZIP residents
Blooming Valley township47%
Ortley town28%
Ortley township17%
Lura township4.8%
Dexter township3.0%
Central Point townshipland only
Egeland townshipland only

Congressional district

Congressional districtShare of ZIP residents
South Dakota's at-large congressional district (SD-AL)100%

Elected officials

OfficeMemberContactShare of residents
U.S. Representative (SD-AL)Dusty Johnson (R)202-225-2801100%
U.S. SenatorJohn Thune (R)202-224-2321 · contact formstatewide
U.S. SenatorMike Rounds (R)202-224-5842 · contact formstatewide
State Senator (State Senate District 4)Stephanie Sauder (R)55%
State Senator (State Senate District 1)Michael Rohl (R)45%
State Representative (State House District 4)Dylan Jordan (R)55%
State Representative (State House District 4)Kent Roe (R)55%
State Representative (State House District 1)Logan Manhart (R)45%
State Representative (State House District 1)Nick Fosness (R)45%

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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 455%
State Senate District 145%

State house districtShare of ZIP residents
State House District 455%
State House District 145%

Voting precincts

4 voting precincts overlap ZIP 57256. Map them, with each precinct's share of the ZIP's residents.

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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:57256")

ZIP 57256 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.