The 2026 United States House of Representatives election in South Dakota is scheduled to be held on November 3, 2026, to elect a member of the United States House of Representatives to represent the state of South Dakota from its at-large congressional district. The election will coincide with other elections held on the same date. The primary elections will be held on June 2, 2026, and in races where no candidate receives at least 35% in a primary, runoff elections will take place on July 28.[1]

Incumbent Republican representative Dusty Johnson was re-elected with 72.0% of the vote in 2024.[2]

Primary elections were held on June 2, 2026. Jackley received 79.2% of the vote against minimal opposition and Gronli ran unopposed for their respective party's nominations. Republicans have not lost a Congressional election in South Dakota since 2008.

Republican primary

Candidates

Nominee

Eliminated in primary

  • James Bialota Jr., small business owner and real estate investor[5]

Withdrawn

Declined

Endorsements

Marty Jackley

Executive branch officials

State legislators

Organizations

James Bialota

State legislators

Fundraising

Campaign finance reports as of May 13, 2026
Candidate Raised Spent Cash on hand
Casey Crabtree (R) $254,650 $183,634 $71,016
Marty Jackley (R) $1,331,302 $264,431 $1,066,870
Source: Federal Election Commission[13]

Polling

Poll source Date(s)
administered		 Sample
size[a]		 Margin
of error		 James
Bialota		 Marty
Jackley		 Undecided
Mason-Dixon Polling & Strategy[14][A] April 7–11, 2026 500 (RV) ± 4.5% 12% 68% 20%
Emerson College[15][B] March 7–9, 2026 415 (LV) ± 4.8% 7% 51% 41%
Hypothetical polling
Poll source Date(s)
administered		 Sample
size[a]		 Margin
of error		 Casey
Crabtree		 Marty
Jackley		 Tony
Venhuizen		 Undecided
Guidant Polling & Strategy (R)[16] June 17–19, 2025 400 (LV) ± 4.9% 5% 48% 5% 42%
Poll source Date(s)
administered		 Sample
size[a]		 Margin
of error		 James
Bialota		 Casey
Crabtree		 Marty
Jackley		 Undecided
Mason-Dixon Polling & Strategy[17][A] October 16–20, 2025 502 (RV) ± 4.5% 2% 5% 57% 36%

Results

Primary results by county:
  Jackley
  •   60–70%
  •   70–80%
  •   80–90%
Republican primary results
Party Candidate Votes %
Republican Marty Jackley 103,290 79.2
Republican James Bialota Jr. 27,140 20.8
Total votes 130,430 100.0

Democratic primary

Candidates

Nominee

Withdrawn

  • Billy Mawhiney, nonprofit executive[19]

Endorsements

Nikki Gronli
Executive branch officials

Fundraising

Campaign finance reports as of May 13, 2025
Candidate Raised Spent Cash on hand
Nikki Gronli (D) $213,223 $110,642 $102,581
Source: Federal Election Commission[13]

Independents

Candidates

Filed paperwork

General election

Predictions

Source Ranking As of
The Cook Political Report[22] Solid R July 10, 2025
Inside Elections[23] Solid R July 10, 2025
Sabato's Crystal Ball[24] Safe R July 10, 2025
Race to the WH[25] Safe R October 11, 2025

Fundraising

Campaign finance reports as of May 13, 2026
Candidate Raised Spent Cash on hand
Marty Jackley (R) $1,331,302 $264,431 $1,066,870
Nicole Gronli (D) $213,223 $110,642 $102,581
Source: Federal Election Commission[26]


Notes

  1. ↑ Endorsement received after the first round of primary voting took place.
  1. 1 2 3 Key:
    A – all adults
    RV – registered voters
    LV – likely voters
    V – unclear
Partisan clients
  1. 1 2 Poll sponsored by South Dakota News Watch and the Chiesman Center for Democracy at the University of South Dakota
  2. ↑ Poll sponsored by KELO-TV and Nexstar Media

References

  1. ↑ "South Dakota 2026 General Election". The Green Papers. Retrieved June 13, 2025.
  2. ↑ "2024 House Vote Tracker". Cook Political Report. Retrieved June 13, 2025.
  3. ↑ Dausch, Dominik (June 27, 2025). "Marty Jackley plans to run for US Rep. Dusty Johnson's job. Here's what we know". Argus Leader.
  4. ↑ staff, Dakota News Now (April 1, 2026). "AG Marty Jackley qualifies for U.S. House of Representatives election ballot". Dakota News Now. Retrieved April 1, 2026.
  5. ↑ "2026 Primary Election Candidate List Candidate List". South Dakota Secretary of State. Retrieved April 7, 2026.
  6. ↑ "Casey Crabtree exits Congress race, backs Jackley". keloland.com. February 27, 2026. Retrieved April 18, 2026.
  7. ↑ Hill, Meredith Lee (June 27, 2025). "Rep. Dusty Johnson to announce a bid for South Dakota governor Monday". Politico. Retrieved June 28, 2025.
  8. ↑ Dakota War College (March 12, 2026). "Trump endorses Marty Jackley for Congress". Dakota War College. Retrieved March 12, 2026.
  9. ↑ Keloland. "Casey Crabtree exits Congress race, backs Jackley". Keloland. Retrieved March 17, 2026.
  10. ↑ US Chamber of Commerce. "U.S. Chamber Endorses Candidate Marty Jackley to Represent South Dakota in the House of Representatives". US Chamber of Commerce. Retrieved June 5, 2026.
  11. ↑ Dakota War College. "Bialota receives Aylward endorsement in Congressional race". Dakota War College. Retrieved April 14, 2026.
  12. ↑ "Of course, there's that other endorsement for Congress". South Dakota War College. April 25, 2026. Retrieved April 27, 2026.
  13. 1 2 "2026 Election United States House - South Dakota at-large". fec.gov. Federal Election Commission. Retrieved March 7, 2026.
  14. ↑ Rifaat, Alexander (April 20, 2026). "Poll: Johnson widens lead in SD GOP governor race". South Dakota News Watch. Retrieved April 20, 2026.
  15. ↑ "South Dakota 2026 Poll: Dusty Johnson Leads Incumbent Larry Rhoden in Governor Election". Emerson College Polling. March 11, 2026. Retrieved March 11, 2026.
  16. ↑ "New poll shows Jackley leading potential candidates for U.S. House". KDLT-TV. June 27, 2025. Retrieved June 28, 2025.
  17. ↑ Killough, Kevin (October 29, 2025). "House poll: Jackley leads with many undecided". South Dakota News Watch. Retrieved October 30, 2025.
  18. ↑ Huber, Makenzie (September 8, 2025). "Former USDA appointee announces Democratic bid for Congress". South Dakota Searchlight. Retrieved September 8, 2025.
  19. ↑ "Billy Mawhiney drops out of Congressional race".
  20. ↑ Burns, Krista (June 5, 2026). "President Biden Endorses Dan Ahlers, Julian Beaudion, and Nikki Gronli for Governor, U.S. Senate, & U.S. House". South Dakota Democratic Party. Retrieved June 5, 2026.
  21. ↑ "FEC Form 2 for Report FEC-1926817". docquery.fec.gov. Retrieved November 24, 2025.
  22. ↑ "2026 CPR House Race Ratings". Cook Political Report. Retrieved July 10, 2025.
  23. ↑ "2026 House Ratings". Inside Elections.
  24. ↑ "2026 House". Sabato's Crystal Ball. Retrieved July 10, 2025.
  25. ↑ "The 2026 House Forecast". Race to the WH. Retrieved October 11, 2025.
  26. ↑ "2026 Election United States House - South Dakota". fec.gov. Federal Election Commission. Retrieved June 2, 2026.

Official campaign websites

source: https://en.wikipedia.org/wiki/2026_United_States_House_of_Representatives_election_in_South_Dakota