ZIP code 57454: Langford, SD

ZIP code 57454 is in Langford (51% of residents), in Marshall County (90%) and Day County (10.0%), South Dakota. 49% of its residents live outside city limits. It is in South Dakota's at-large congressional district. Its state senate district is State Senate District 1; its state house district is State House District 1.

551residents (2020 Census)

151.3 sq miland area

1cities and towns

1congressional district

4voting precincts

See it on the map All of South Dakota

City and county

City or town	Share of ZIP residents
Langford	51%

County	Share of ZIP residents
Marshall County	90%
Day County	10.0%

Town or county subdivision	Share of ZIP residents
Langford town	51%
Sisseton township	16%
Newport township	10%
Hickman township	8.0%
Homer township	5.6%
Fort township	4.2%
Farmington township	3.3%
Independence township	1.1%
Weston township	land only

Congressional district

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

Elected officials

Office	Member	Contact	Share of residents
U.S. Representative (SD-AL)	Dusty Johnson (R)	202-225-2801	100%
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)		100%
State Representative (State House District 1)	Logan Manhart (R)		100%
State Representative (State House District 1)	Nick Fosness (R)		100%

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

Langford laws: search for the Langford, South Dakota code of ordinances
Marshall County website: http://marshall.sdcounties.org/
Marshall County laws: search for the Marshall County, South Dakota code of ordinances
Day County website: http://day.sdcounties.org
Day County laws: search for the Day County, South Dakota code of ordinances

State legislative districts

State senate district	Share of ZIP residents
State Senate District 1	100%

State house district	Share of ZIP residents
State House District 1	100%

Voting precincts

4 voting precincts overlap ZIP 57454. 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:57454")

ZIP 57454 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.