United States Senate election in California, 2010 Republican primary Polling

| Poll_source | Dates_administered | Sample_size | Margin_of_Error | Tom_Campbell | Carly_Fiorina | Chuck_DeVore | Other | Unde_cided |
|---|---|---|---|---|---|---|---|---|
| The Field Poll (report) | Sept. 18–October 6, 2009 | 373 | ±4.5% | — | 21% | 20% | — | 59% |
| The Field Poll (report) | Feb. 20–March 1, 2009 | 298 | ±3.6% | — | 31% | 19% | — | 36% |