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| Poll source | Date(s) administered | Sample size | Margin of error | DonaldTrump Republican | JoeBiden Democratic | JoJorgensen Libertarian | HowieHawkins Green | Other | Undecided |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| David Binder Research | Oct 28 – Nov 1, 2020 | 800 (LV) | – | 31% | 62% | – | – | 3% | 4% |
| Swayable | Oct 23–26, 2020 | 635 (LV) | ± 5.2% | 35% | 62% | 2% | 1% | – | – |
| UC Berkeley/LA Times | Oct 16–21, 2020 | 5,352 (LV) | ± 2% | 29% | 65% | 1% | 0% | 0% | 3% |
| Public Policy Institute of California | Oct 9–18, 2020 | 1,185 (LV) | ± 4.3% | 32% | 58% | 3% | 2% | 1% | 4% |
| SurveyMonkey/Tableau | Sep 1–30, 2020 | 20,346 (LV) | – | 35% | 63% | – | – | – | 2% |
| SurveyUSA | Sep 26–28, 2020 | 588 (LV) | ± 5.4% | 34% | 59% | – | – | 3% | 6% |
| Redfield & Wilton Strategies | Sep 19–21, 2020 | 1,775 (LV) | – | 28% | 62% | 1% | 1% | 1% | 8% |
| UC Berkeley/LA Times | Sep 9–15, 2020 | 5,942 (LV) | ± 2% | 28% | 67% | 1% | 0% | 0% | 3% |
| Public Policy Institute of California | Sep 4–13, 2020 | 1,168 (LV) | ± 4.3% | 31% | 60% | 3% | 2% | 1% | 2% |
| Spry Strategies/Women's Liberation Front เก็บถาวร 2020-09-27 ที่ เวย์แบ็กแมชชีน | Aug 29 – Sep 1, 2020 | 600 (LV) | ± 4% | 39% | 56% | – | – | – | 5% |
| SurveyMonkey/Tableau | Aug 1–31, 2020 | 17,537 (LV) | – | 35% | 63% | – | – | – | 2% |
| David Binder Research | Aug 22–24, 2020 | 800 (LV) | – | 31% | 61% | – | – | 3% | 5% |
| Redfield and Wilton Strategies | Aug 9, 2020 | 1,904 (LV) | ± 2.3% | 25% | 61% | 1% | 1% | 2% | 9% |
| SurveyMonkey/Tableau | Jul 1–31, 2020 | 19,027 (LV) | – | 35% | 63% | – | – | – | 2% |
| University of California Berkeley | Jul 21–27, 2020 | 6,756 (LV) | ± 2.0% | 28% | 67% | – | – | – | 5% |
| SurveyMonkey/Tableau | Jun 8–30, 2020 | 8,412 (LV) | – | 36% | 62% | – | – | – | 2% |
| Public Policy Institute of California | May 19–26, 2020 | 1,048 (LV) | ± 4.6% | 33% | 57% | – | – | 6% | 3% |
| SurveyUSA | May 18–19, 2020 | 537 (LV) | ± 5.4% | 30% | 58% | – | – | 5% | 7% |
| Emerson College | May 8–10, 2020 | 800 (RV) | ± 3.4% | 35% | 65% | – | – | – | – |
| Public Policy Polling | Mar 28–29, 2020 | 962 (RV) | – | 29% | 67% | – | – | – | 3% |
| AtlasIntel | Feb 24 – Mar 2, 2020 | 1,100 (RV) | ± 3.0% | 26% | 62% | – | – | 12% | – |
| YouGov | Feb 26–28, 2020 | 1,507 (RV) | – | 31% | 59% | – | – | 4% | 4% |
| CNN/SSRS | Feb 22–26, 2020 | 951 (RV) | ± 3.3% | 35% | 60% | – | – | 3% | 3% |
| University of California Berkeley | Feb 20–25, 2020 | 5,526 (RV) | – | 31% | 58% | – | – | – | 11% |
| SurveyUSA | Feb 13–16, 2020 | 1,196 (RV) | ± 3.1% | 37% | 57% | – | – | – | 6% |
| YouGov/USC Price-Schwarzenegger Institute | Feb 1–15, 2020 | 1,200 (RV) | ± 3.1% | 30% | 60% | – | – | – | 4% |
| SurveyUSA | Jan 14–16, 2020 | 1,967 (RV) | ± 2.8% | 35% | 59% | – | – | – | 6% |
| CNN/SSRS | Dec 4–8, 2019 | 1,011 (RV) | ± 3.4% | 36% | 56% | – | – | 3% | 5% |
| SurveyUSA | Nov 20–22, 2019 | 2,039 (RV) | ± 2.4% | 32% | 59% | – | – | – | 9% |
| SurveyUSA | Oct 15–16, 2019 | 1,242 (RV) | ± 3.8% | 32% | 59% | – | – | – | 9% |
| Emerson College | Sep 13–16, 2019 | 830 (RV) | ± 3.3% | 36% | 64% | – | – | – | – |
| SurveyUSA | Sep 13–15, 2019 | 1,785 (RV) | ± 3.2% | 31% | 57% | – | – | – | 11% |
| SurveyUSA | Aug 1–5, 2019 | 2,184 (RV) | ± 2.7% | 27% | 61% | – | – | – | 12% |
| SurveyUSA | Mar 22–25, 2018 | 882 (RV) | ± 3.8% | 33% | 56% | – | – | – | 11% |