United States / 2026 United States Senate election in South Dakota
Mason-Dixon Polling & Strategy
Voting intention · published 22 Oct 2026
- Country
- 🇺🇸 United States
- Election
- 2026 United States Senate election in South Dakota
- Polling institute
- Mason-Dixon Polling & Strategy
- Published
- 22 Oct 2026
- Fieldwork
- 12 Oct 2026 – 14 Oct 2026
- Sample size
- 500
- Margin of error
- ±4.5
- Methodology
- Not published
Results
Mason-Dixon Polling & Strategy, 22 Oct 2026: Rounds (R) leads with 56.0%, 19.0 points ahead of Bengs (I).
- Mike Rounds (R)56.0%new
- Brian Bengs (I)37.0%new
No earlier poll by this institute for this election, so no change is shown.
How to read a poll
- Sample size is how many people were asked. More people means less random error, never none.
- ±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
- Two polls can differ because they were taken on different dates, with different methods and different samples.
- est. means the institute did not publish a margin of error, so it is estimated from the sample size.
- The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.