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Kansas Senate polls
Hamilton (D) vs. Marshall (R)
Adam Hamilton leads the 2026 Kansas Senate race by 1.8 points in PolitiKool's polling average, as of Oct. 11, 2026.
- Hamilton 46.7%, Marshall 44.9%.
- 8 polls from 8 pollsters, weighted by recency, sample size, pollster record and partisan sponsorship.
- The margin has moved 4.9 points toward Adam Hamilton over the past month.
- Rated Toss-up, combining the average with the Cook Political Report, Sabato's Crystal Ball and Inside Elections.
- The seat is held by Roger Marshall (R).
Kansas Senate polling average
Adam Hamilton46.7%
Roger Marshall44.9%
MarginHamilton +1.8
Average as of Oct. 11, 2026 · — Adam Hamilton · — Roger Marshall
Latest Kansas Senate polls
| Dates | Pollster | Sample | Hamilton | Marshall | Margin |
|---|---|---|---|---|---|
| Sept. 30 – Oct. 4 | GBAO (partisan) | 600 LV | 46% | 41% | Hamilton +5 |
| Sept. 24 – Oct. 4 | YouGov | 2,255 LV | 48% | 45% | Hamilton +3 |
| Sept. 29 – Oct. 1 | Trafalgar Group (partisan) | 1,095 LV | 44% | 44% | Even |
| Sept. 22–30 | New York Times/Siena University | 605 LV | 45% | 45% | Even |
| Sept. 22–24 | Wedgewood Polls | 500 LV | 50% | 48% | Hamilton +2 |
| Sept. 15–16 | Emerson College / Nexstar Media | 750 LV | 45% | 43% | Hamilton +2 |
| Sept. 13–16 | Global Strategy Group (partisan) | 800 LV | 49% | 47% | Hamilton +2 |
| Sept. 8–10 | co/efficient (partisan) | 915 LV | 44% | 49% | Marshall +5 |
| Aug. 12–16 | Global Strategy Group (partisan) | 800 LV | 44% | 43% | Hamilton +1 |
| Aug. 7–8 | Public Policy Polling (partisan) | 569 LV | 45% | 46% | Marshall +1 |
| July 8–13 | GBAO (partisan) | 600 LV | 43% | 47% | Marshall +4 |
| Jan. 26–28 | Tavern Research (partisan) | 1,013 LV | 46% | 54% | Marshall +8 |