Boundary Atlas

Custer, South Dakota

Custer is a city in Custer County, South Dakota, with 1,924 residents in 2020. It is in South Dakota's at-large congressional district. Its state senate district is State Senate District 30; its state house district is State House District 30.

1,924residents (2020 Census)
2.6 sq miland area
1ZIP codes
1congressional district

County

CountyShare of residents
Custer County100%

Congressional district

Congressional districtShare of 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 30)Amber Hulse (R)100%
State Representative (State House District 30)Tim Goodwin (R)100%
State Representative (State House District 30)Trish Ladner (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 residents
State Senate District 30100%

State house districtShare of residents
State House District 30100%

ZIP codes

Percentages mark ZIPs only partly in Custer: the share of that ZIP's residents living in it.

Get this in your AI agent

Your agent can get Custer's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

related_geographies(id="us:place:4615140")

Custer here is the Census Bureau's place boundary as of January 1, 2025. Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.