| Poll | Date | Sample | Kasich | Bush | Walker | Rubio | Huckabee | Paul | Carson | Cruz | Christie | Perry | Santorum | Graham | Trump | Fiorina | Spread |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Quinnipiac | 6/4 - 6/15 | 434 RV | 19 | 9 | 8 | 7 | 7 | 7 | 6 | 6 | 3 | 2 | 2 | 2 | 1 | 1 | Kasich +10 |
| PPP (D) | 6/4 - 6/7 | 411 RV | 19 | 12 | 13 | 12 | 6 | 9 | 13 | 5 | 4 | -- | -- | -- | -- | -- | Kasich +6 |
| Quinnipiac | 3/17 - 3/28 | 404 RV | 20 | 8 | 9 | 5 | 9 | 7 | 8 | 9 | 5 | 1 | 1 | 0 | -- | -- | Kasich +11 |
| Quinnipiac | 1/22 - 2/1 | 337 RV | 14 | 10 | 11 | 4 | 7 | 10 | 8 | 6 | 6 | 1 | 1 | -- | -- | -- | Kasich +3 |
| Magellan (R) | 4/14 - 4/15 | LV | 10 | 13 | 4 | 5 | 17 | 15 | -- | 12 | 13 | -- | -- | -- | -- | -- | Huckabee +2 |
| PPP (D) | 8/16 - 8/19 | 357 RV | 8 | 10 | -- | 9 | -- | 17 | -- | 6 | 17 | -- | 4 | -- | -- | -- | Tie |