Aggregate of all polls released for South Dakota's Senate election between independent Brian Bengs and Republican Mike Rounds. This page will update the moment new polls are released, including the polling average, projected margin, and survey details.
2026 South Dakota Senate Polling Average
Mike Rounds leads Brian Bengs by 4.8% in the Pollsmax polling average for the 2026 South Dakota Senate election, 48.2% to 43.4%. The average currently aggregates results from 9 polls. According to the latest South Dakota Senate poll, conducted by Zenith Research on September 27, Rounds leads Bengs 53% to 47%.
Democrat
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Weighted polling average
Republican
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Weighted polling average
Net margin
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Polling average difference
Polls Included
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Number of polls conducted
Pollsmax creates a time-weighted and partisanship-adjusted polling average from an aggregate of all polls conducted for the general election. See the polling methodology to learn more about how polls are standardized and weighted.