| Poll | Date | Sample | MoE | Guinta (R) | Shea-Porter (D) | Spread |
|---|---|---|---|---|---|---|
| Final Results | -- | -- | -- | 51.8 | 48.2 | Guinta +3.6 |
| WMUR/UNH | 10/29 - 11/2 | 405 LV | 4.9 | 50 | 49 | Guinta +1 |
| New England College | 10/31 - 11/1 | 778 LV | 3.5 | 52 | 43 | Guinta +9 |
| WMUR/UNH | 10/22 - 10/26 | 261 LV | 6.1 | 40 | 44 | Shea-Porter +4 |
| New England College | 10/24 - 10/24 | 556 LV | 4.2 | 49 | 43 | Guinta +6 |
| New England College | 10/16 - 10/16 | 461 LV | 4.6 | 47 | 46 | Guinta +1 |
| UMass Amherst/WBZ | 10/10 - 10/15 | 160 LV | -- | 37 | 54 | Shea-Porter +17 |
| New England College | 10/9 - 10/9 | 536 LV | 4.2 | 46 | 44 | Guinta +2 |
| WMUR/UNH | 9/29 - 10/5 | 258 LV | 6.1 | 39 | 42 | Shea-Porter +3 |
| New England College | 10/3 - 10/3 | 626 LV | 3.9 | 44 | 47 | Shea-Porter +3 |
| New England College | 9/26 - 9/26 | 629 LV | 3.9 | 51 | 41 | Guinta +10 |
| New England College | 9/19 - 9/20 | 715 LV | 3.7 | 45 | 45 | Tie |
| New England College | 9/10 - 9/11 | 607 LV | -- | 42 | 46 | Shea-Porter +4 |
| WMUR/UNH | 8/7 - 8/17 | 297 LV | 5.7 | 45 | 41 | Guinta +4 |
| WMUR/UNH | 6/19 - 7/1 | 263 LV | 6.0 | 47 | 43 | Guinta +4 |
| WMUR/UNH | 4/1 - 4/9 | 199 LV | -- | 35 | 44 | Shea-Porter +9 |
| WMUR/UNH | 1/21 - 1/26 | 245 LV | -- | 45 | 39 | Guinta +6 |
| WMUR/UNH | 10/7 - 10/16 | 258 LV | -- | 32 | 48 | Shea-Porter +16 |
| New England College | 10/7 - 10/9 | 882 RV | 3.3 | 42 | 43 | Shea-Porter +1 |