Boundary Atlas

ZIP code 57363: Mount Vernon, SD

ZIP code 57363 is in Mount Vernon (47% of residents), in Davison County (95%), Sanborn County (2.7%) and Aurora County (1.8%), South Dakota. 53% 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 20 (98%) and State Senate District 21 (1.8%); its state house districts are State House District 20 (98%) and State House District 21 (1.8%).

984residents (2020 Census)
189.8 sq miland area
1cities and towns
1congressional district
6voting precincts

See it on the mapAll of South Dakota

City and county

City or townShare of ZIP residents
Mount Vernon47%

CountyShare of ZIP residents
Davison County95%
Sanborn County2.7%
Aurora County1.8%

Town or county subdivisionShare of ZIP residents
Mount Vernon city47%
Mount Vernon township18%
Baker township8.0%
Blendon township7.6%
Union township6.8%
Tobin township3.2%
Beulah township2.9%
Elliott township2.7%
Palatine township1.5%
Lisbon township1.1%
Badger township0.7%
Hopper township0.3%
Letcher 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 20)Paul Miskimins (R)98%
State Senator (State Senate District 21)MyKala Voita (R)1.8%
State Representative (State House District 20)Jeff Bathke (R)98%
State Representative (State House District 20)Kaley Nolz (R)98%
State Representative (State House District 21)Jim Halverson (R)1.8%
State Representative (State House District 21)Marty Overweg (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

State legislative districts

State senate districtShare of ZIP residents
State Senate District 2098%
State Senate District 211.8%

State house districtShare of ZIP residents
State House District 2098%
State House District 211.8%

Voting precincts

6 voting precincts overlap ZIP 57363. 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:57363")

ZIP 57363 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.