United States Senate election in California, 2010 General election Polling

| Poll_source | Dates_administered | Sample_size | Margin_of_error | Barbara_Boxer_D | Carly_Fiorina_R | Other | Undecided |
|---|---|---|---|---|---|---|---|
| Suffolk University (report) | October 21–24, 2010 | 600 | ± 4.0% | 52% | 43% | 4% | 2% |
| Fox/Pulse Opinion Research (report) | October 23, 2010 | 1000 | ± 3.0% | 48% | 44% | 5% | 3% |
| Public Policy Polling (report) | October 21–23, 2010 | 622 | ± 3.2% | 52% | 43% | 0% | 5% |
| Rasmussen Reports (report) | October 21, 2010 | 750 | ± 4.0% | 48% | 46% | 3% | 3% |
| USC/LA Times (report) | October 13–20, 2010 | 878 | ± 3.2% | 50% | 42% | 4% | 4% |
| Tarrance Group (report) | October 17–19, 2010 | — | ± 4.1% | 44% | 44% | 6% | 5% |
| PPIC (report) | October 10–17, 2010 | 1067 | ± 3.5% | 43% | 38% | 6% | 13% |
| Reuters (report) | October 12–14, 2010 | 601 | ± 4.0% | 46% | 45% | 2% | 6% |