South Dakota 2026 midterm elections
Who's running in South Dakota's 2026 midterm elections: the U.S. Senate race and its at-large House seat, on Tuesday, Nov. 3, 2026.
| Seat | Candidate | vs | Candidate | Status |
|---|---|---|---|---|
| U.S. Senate Held by (R) Mike Rounds | Brian Bengs (I) | vs | Mike Rounds (R) Incumbent · Voting record → | Incumbent running |
| At-Large District (SD-AL) Replacing (R) Dusty Johnson, lost the primary for Governor of South Dakota | Nikki Gronli (D) | vs | Marty Jackley (R) | Open seat |
Register to vote in South Dakota
- By mail: received by Oct. 19 — Original signature required; fax and email are not accepted.
- In person: Oct. 19 — At the county auditor's office.
Online registration: No
Same-day registration: not available.
Check your registration · Register
Sources: sdsos.gov ↗ · sdsos.gov ↗