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 |
|---|---|---|---|---|---|---|---|
| Fox News/Pulse Opinion Research (report) | September 18, 2010 | 1000 | ± 3.0% | 47% | 46% | 3% | 4% |
| Public Policy Polling (report) | September 14–16, 2010 | 630 | ± 3.9% | 50% | 42% | — | 8% |
| Fox News (report) | September 11, 2010 | 1000 | ± 3.0% | 46% | 44% | 4% | 6% |
| Rasmussen Reports (report) | September 6, 2010 | 750 | ± 4.0% | 47% | 48% | 2% | 3% |
| Rasmussen Reports (report) | September 6, 2010 | 750 | ± 4.0% | 42% | 47% | — | — |
| CNN(report) | September 2–7, 2010 | 866 | ± 3.5% | 48% | 44% | 5% | 3% |
| Survey USA (report) | August 31-September 1, 2010 | 569 | ± 4.2% | 46% | 48% | 5% | 1% |
| Rasmussen Reports (report) | August 24, 2010 | 750 | ± 4.0% | 44% | 43% | 5% | 8% |