Boundary Atlas

ZIP code 57438: Faulkton, SD

ZIP code 57438 is in Faulkton (58% of residents), Brentwood Colony (8.2%) and Evergreen Colony (7.8%), in Faulk County, South Dakota. 26% 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 23; its state house district is State House District 23.

1,417residents (2020 Census)
435.1 sq miland area
4cities and towns
1congressional district
5voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Faulkton58%
Brentwood Colony8.2%
Evergreen Colony7.8%
Thunderbird Colony0.5%

CountyShare of ZIP residents
Faulk County100%

Town or county subdivisionShare of ZIP residents
Faulkton city58%
Myron township10%
Saratoga township9.5%
Tamworth township7.5%
Lafoon township3.7%
Freedom township2.2%
Arcade township1.9%
Bryant township1.3%
Orient township1.3%
Pulaski UT1.3%
Enterprise township1.1%
Emerson township0.6%
Irving township0.6%
Centerville township0.5%
Hillsdale township0.2%
O'Neil township<0.1%

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 23)Mark Lapka (R)100%
State Representative (State House District 23)Scott Moore (R)100%
State Representative (State House District 23)Spencer Gosch (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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 23100%

State house districtShare of ZIP residents
State House District 23100%

Voting precincts

5 voting precincts overlap ZIP 57438. 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:

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ZIP 57438 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.