Boundary Atlas

ZIP code 57061: Sinai, SD

ZIP code 57061 is in Sinai, in Brookings County, South Dakota. It is in South Dakota's at-large congressional district. Its state senate district is State Senate District 8; its state house district is State House District 8.

99residents (2020 Census)
0.4 sq miland area
1cities and towns
1congressional district
1voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Sinai100%

CountyShare of ZIP residents
Brookings County100%

Town or county subdivisionShare of ZIP residents
Sinai town100%

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 8)Casey Crabtree (R)100%
State Representative (State House District 8)Tim Reisch (R)100%
State Representative (State House District 8)Tim Walburg (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 8100%

State house districtShare of ZIP residents
State House District 8100%

Voting precincts

1 voting precinct overlap ZIP 57061. 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 57061 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.