Boundary Atlas

South Dakota's at-large congressional district (SD-AL)

South Dakota's at-large congressional district (SD-AL) covers parts or all of 66 counties, including Aurora County, Beadle County, Bennett County, Bon Homme County, Brookings County and Brown County, and 401 ZIP codes (360 wholly inside it). Its 2020 population was 886,667. This is the map in force for the November 3, 2026 election.

886,667residents (2020 Census)
66counties
401ZIP codes
818voting precincts

Who represents SD-AL

OfficeMemberContact
U.S. Representative (SD-AL)Dusty Johnson (R)202-225-2801
U.S. SenatorJohn Thune (R)202-224-2321 · contact form
U.S. SenatorMike Rounds (R)202-224-5842 · contact form

Officials serving now (members of Congress until January 3, 2027). Sources: Members of Congress: the @unitedstates project, congress-legislators (CC0).

Counties

CountyShare of the county's residents in SD-AL
Aurora County100%
Beadle County100%
Bennett County100%
Bon Homme County100%
Brookings County100%
Brown County100%
Brule County100%
Buffalo County100%
Butte County100%
Campbell County100%
Charles Mix County100%
Clark County100%
Clay County100%
Codington County100%
Corson County100%
Custer County100%
Davison County100%
Day County100%
Deuel County100%
Dewey County100%
Douglas County100%
Edmunds County100%
Fall River County100%
Faulk County100%
Grant County100%
Gregory County100%
Haakon County100%
Hamlin County100%
Hand County100%
Hanson County100%
Harding County100%
Hughes County100%
Hutchinson County100%
Hyde County100%
Jackson County100%
Jerauld County100%
Jones County100%
Kingsbury County100%
Lake County100%
Lawrence County100%
Lincoln County100%
Lyman County100%
Marshall County100%
McCook County100%
McPherson County100%
Meade County100%
Mellette County100%
Miner County100%
Minnehaha County100%
Moody County100%
Oglala Lakota County100%
Pennington County100%
Perkins County100%
Potter County100%
Roberts County100%
Sanborn County100%
Spink County100%
Stanley County100%
Sully County100%
Todd County100%
Tripp County100%
Turner County100%
Union County100%
Walworth County100%
Yankton County100%
Ziebach County100%

ZIP codes

Percentages mark ZIPs only partly in SD-AL: the share of that ZIP's residents inside it.

Towns

Aberdeen city, Aberdeen township, Ada township, Adams township, Adams township, Adrian township, Afton township, Afton township, Agar town, Agency township, Akaska town, Alban township, Albee town, Alcester city, Alcester township, Alden township, Alexandria city, Allen township, Alliance township, Allison township, Alpena town, Alpena township, Alpha township, Altamont town, Altamont township, Alto township, Alton township, Altoona township, America township, Andover town, Andover township, Anina township, Antelope Valley township, Antelope township, Antelope township, Arcade township, Argentine township, Argo township, Arlington city and Arlington city and others.

Get this in your AI agent

Your agent can draw every precinct in SD-AL, or list them with population shares (related_geographies). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:

get_boundaries(id="us:congressional_district:4600", children_level="precinct", include_districts=True)