South Dakota has a single at-large congressional district, meaning one representative serves the entire state in the U.S. House of Representatives. As one of the least populous states, South Dakota does not have enough residents to warrant multiple districts under the current apportionment.
South Dakota’s single seat covers all of its about 887,000 residents counted in the 2020 Census, so every voter in the state shares the same U.S. House member. The at-large seat is on the ballot every two years, next on November 3, 2026, and the winner represents the whole state rather than one district within it.
South Dakota is represented by one at-large member because its population supports just a single seat, and the reapportionment that followed the 2020 Census kept it at one. Unlike states with several districts, South Dakota has no congressional lines to redraw after each census, so the boundary of its district is simply the state border. To confirm you live in South Dakota’s district, use the ZIP code lookup on our home page.
South Dakota’s at-large seat is currently held by Dusty Johnson (R). All House seats are up for election on November 3, 2026.
South Dakota is also represented in the U.S. Senate by Mike Rounds (R) and John Thune (R).
House Districts
1
Party
Republican
Population (2020)
886,667
U.S. Senators
Mike Rounds (R)
John Thune (R)
All congressional districts in this state, 119th Congress. Boundary data: U.S. Census Bureau TIGERweb. Map tiles: OpenStreetMap.
Find Your South Dakota District
South Dakota has a single at-large district. All residents are represented by the same House member.
This page covers U.S. House districts only. South Dakota also has state legislative districts, which are drawn separately and elect members of the state legislature. To find yours, use the USAGov directory of elected officials.
View South Dakota’s At-Large District →Browse Other States
Explore congressional districts in other states.
Browse All 435 Districts → What congressional district am I in? →For the 2026 races in South Dakota, including the districts to watch and the primary date, see 2026 Congressional Elections in South Dakota.
2026 Senate race
South Dakota has a U.S. Senate seat on the ballot on November 3, 2026. The seat is currently held by Mike Rounds (R), who is running for re-election. Both of South Dakota’s senators and its single House member answer to the whole state. For every 2026 Senate race, see the 2026 Senate elections tracker.
Learn more about Congress
South Dakota representatives and contact details
South Dakota has a single at-large congressional district, meaning one U.S. Representative represents the entire state in the House of Representatives.
| District | Representative | Party | Contact |
|---|---|---|---|
| SD-AL At-Large | Dusty Johnson | R Republican Party | 202-225-2801 Official website |
South Dakota congressional delegation
South Dakota has 3 seats in Congress: 1 in the U.S. House of Representatives and 2 in the U.S. Senate.
The House delegation has 1 Republican.
House members by party
Republican (1)
Dusty Johnson (at-large seat)
South Dakota in the U.S. Senate
South Dakota is represented in the U.S. Senate by John Thune (Republican) and Mike Rounds (Republican).
Seats on the South Dakota ballot this year are listed on the South Dakota 2026 elections page.
Frequently Asked Questions
How many congressional districts does South Dakota have?
South Dakota has one at-large congressional district, meaning the state is not divided into multiple districts for U.S. House elections.
Who represents South Dakota in the U.S. House of Representatives?
Dusty Johnson (At-Large) represents South Dakota in the U.S. House of Representatives as the state's at-large member.
How do I find which South Dakota congressional district I live in?
Use the lookup on the home page. If your ZIP code spans more than one district, it will ask for your street address.
When is the next election for South Dakota U.S. House seats?
All 435 U.S. House seats are up for election every two years, in even-numbered years on the first Tuesday after the first Monday in November.
Districts by ZIP code in South Dakota
South Dakota covers 380 ZIP codes across its single at-large district. A ZIP code is a mail delivery route, not a political boundary, so the two do not line up. In this state every ZIP code sits inside a single district.
To get an exact answer for an address, use the lookup on the home page. A full street address resolves a split ZIP code; a five digit ZIP on its own cannot.
Every district page on this site lists the full ZIP code set for that district. ZIP to district data comes from the U.S. Census Bureau block equivalency file for the 119th Congress.
Districts by major city in South Dakota
Large cities often sit in more than one congressional district. These are the largest cities named on the district pages for South Dakota, with the district or districts that cover each one.
- Aberdeen: district At-Large
- Brookings: district At-Large
- Rapid City: district At-Large
- Sioux Falls: district At-Large
City coverage is drawn from the district profiles on this site, which are based on U.S. Census Bureau data for the 119th Congress.
How many representatives does South Dakota have?
South Dakota has 1 seat in the U.S. House of Representatives, elected at large by the whole state. It also elects 2 U.S. senators, as every state does.
Local surveillance camera contracts
Automated license plate reader contracts are approved locally, by city councils and county boards, not by Congress. 2 places in this state have a contract record documented from public sources on Who Approved This, an independent public-records project.
South Dakota on the November 3, 2026 ballot
All 1 South Dakota seat in the U.S. House is on the ballot on Tuesday, November 3, 2026. House terms run 2 years, so every seat is contested at each general election. Winners take office on January 3, 2027.
A U.S. Senate seat is also on the ballot in South Dakota. It is held by Mike Rounds (Republican). In the 2026 race, the incumbent is running again. All 35 Senate races in 2026.
Polling places in South Dakota are open 7 a.m. to 7 p.m., local time. Registration status, polling place and sample ballot information for South Dakota are on the official federal voter page: vote.gov.
What is on the ballot nationally on November 3, 2026
Last updated September 7, 2026.
Data last checked September 7, 2026.
South Dakota results on election night
South Dakota posts its own returns. Unofficial numbers appear on election night and certified results follow in the weeks after. Reach the South Dakota election office through the Election Assistance Commission state directory, or through the official federal voter page for South Dakota at vote.gov.
Numbers reported on election night are unofficial. Every state certifies its results on its own schedule, taking days to weeks. Provisional ballots are still being reviewed during that period, and states that accept mail ballots postmarked by election day are still receiving them. Margins in close races move after November 3.