Aggregate of all polls released for South Dakota's at-large congressional district House election between Democrat Nikki Gronli and Republican Marty Jackley. This page will update the moment new polls are released, including the polling average, projected margin, and survey details.
2026 South Dakota at-large House Polling Average
Marty Jackley leads Nikki Gronli by 20.5% in the Pollsmax polling average for the 2026 South Dakota at-large district House election, 55.9% to 35.4%. The average currently aggregates results from 2 polls. According to the latest South Dakota at-large district House poll, conducted by Mason-Dixon Polling & Strategy on October 14, Jackley leads Gronli 60% to 32%.
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.