In the most recent South Dakota 1st congressional district poll (Mason-Dixon Polling & Research, Inc., Oct 12 - 14, 2026, n=500 LV), Jackley (R) leads Gronli (D) 59.6%–31.8%.
Data is synced continuously from the New York Times, which aggregates surveys from major pollsters. The table shows individual pollster results. The map uses the same 2026 non-partisan polling average and candidate-selection method as the homepage maps.
At a glance
- Polls tracked
- 4
- Pollsters
- 3
- Field dates
- Mar 9, 2026 – Oct 14, 2026
- Stages
- General election (2), Primary (2)
- Most recent poll
- Oct 14, 2026
All polls
| Pollster | Partisan | Field dates | Stage | Sample | Results | Margin | Source |
|---|---|---|---|---|---|---|---|
| Mason-Dixon Polling & Research, Inc. | Oct 12 - 14, 2026 | General election | n=500 LV | Jackley (R): 59.6% Gronli (D): 31.8% Don't know: 8.6% | R+27.8% | link | |
| Lake Research Partners | Dem | Aug 26 - 30, 2026 | General election | n=500 LV | Jackley (R): 47% Gronli (D): 43% Don't know: 8% | R+4% | link |
| Mason-Dixon Polling & Research, Inc. | Apr 7 - 11, 2026 | Primary | n=500 RV | Jackley (R): 68% Don't know: 20% Bialota (R): 12% | +56% | link | |
| Emerson College | Mar 7 - 9, 2026 | Primary | n=415 LV | Jackley (R): 51.3% Don't know: 40.8% Bialota (R): 7.1% | +44.2% | link |
4 of 4 polls shown, most recent first. Every number is a single pollster's reported result — no polling average is calculated here. Partisan shows the source’s party flag; a blank means no partisan affiliation is marked.