United States Senate election in Pennsylvania, 2010 General election Polling

| Poll_source | Dates_administered | Sample_size | Margin_of_error | Joe_Sestak_D | Pat_Toomey_R | Other | Undecided |
|---|---|---|---|---|---|---|---|
| Research 2000 (report) | May 24–26, 2010 | 600 | ± 4.0% | 43% | 40% | –– | –– |
| Rasmussen Reports (report) | June 2, 2010 | 500 | ± 4.5% | 38% | 45% | 5% | 12% |
| Public Policy Polling (report) | June 19–21, 2010 | 609 | ± 4.0% | 41% | 41% | –– | 18% |
| Rasmussen Reports (report) | June 29, 2010 | 500 | ± 4.5% | 39% | 45% | 6% | 11% |
| Quinnipiac University (report) | July 6–11, 2010 | 1367 | ± 2.7% | 43% | 43% | 1% | 12% |
| Rasmussen Reports (report) | July 14, 2010 | 750 | ± 4.0% | 38% | 45% | 6% | 12% |
| Rasmussen Reports (report) | July 28, 2010 | 750 | ± 4.0% | 39% | 45% | 6% | 10% |
| Public Policy Polling (report) | August 14–16, 2010 | 585 | ± 4.1% | 36% | 45% | –– | 20% |