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_ |
|---|---|---|---|---|---|---|---|---|---|
| Research 2000 | June 10–16, 2009 | –– | 29% | –– | 20% | –– | –– | –– | –– |
| Research 2000 | June 10–16, 2009 | 40% | 27% | –– | 16% | –– | –– | –– | –– |
| The Field Poll | September 18–October 5, 2009 | –– | 47% | –– | 27% | –– | –– | –– | –– |