California gubernatorial election, 2010 Democratic primary Democratic primary

| Poll_source | Dates_administered | Dianne_Feinstein_ | Jerry_Brown | Antonio_Villaraigosa_ | Gavin_Newsom_ | John_Garamendi_ | Jack_O_Connell_ | Steve_Westly_ | Bill_Lockyer_ |
|---|---|---|---|---|---|---|---|---|---|
| Capitol Weekly/Probolsky | January 22–25, 2009 | 36% | 14% | 9% | 9% | 4% | 3% | 1% | –– |
| Lake Research Partners | February 17–19, 2009 | –– | 27% | 20% | 14% | 8% | 1% | 3% | –– |
| The Field Poll | February 20–March 1, 2009 | 38% | 16% | 16% | 10% | 4% | 1% | 2% | 1% |
| The Field Poll | February 20–March 1, 2009 | –– | 26% | 22% | 16% | 8% | 2% | 2% | 2% |
| Tulchin Poll | April 23, 2009 | –– | 31% | 12% | 16% | 11% | 6% | –– | –– |
| Capital Weekly | May 25, 2009 | –– | 24% | 15% | 16% | 7% | 5% | 3% | –– |
| J. Moore | June 20, 2009 | –– | 47% | –– | 26% | –– | –– | –– | –– |