# Nationwide opinion polling for the 2020 Democratic Party presidential primaries

"none" is preferred when the title is sufficiently descriptive; see [[WP:SDNONE]]
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This is a list of nationwide public opinion polls that were conducted relating to the Democratic primaries for the 2020 United States presidential election. The persons named in the polls were declared candidates or had received media speculation about their possible candidacy.
Given the large number of candidates, the scores of certain low-polling and infrequently-polled candidates have been combined within the "other" column; their exact scores may be viewed by viewing the footnotes associated with each poll. The polls included are among Democrats or Democrats and Democratic-leaning independents, and do not include Republican-leaning independents. Open-ended polls are included and marked with an asterisk (*), but closed-ended versions of such polls are listed where possible. If multiple versions of polls are provided, the version used for debate qualification is prioritized, then the version among likely voters, then registered voters, then adults.

## Background

The Democratic National Committee (DNC) determined that candidates could qualify for the first two Democratic primary debates either by polling at 1% or higher in at least three national or early-state (Iowa, New Hampshire, Nevada, and South Carolina) polls sponsored or conducted by designated organizations (in different regions if by the same organization) published after January 1, 2019, up until June 12, 2019, or by a fundraising threshold requiring at least 65,000 unique donors with at least 200 in 20 different states. If more than 20 candidates met either threshold, candidates meeting both thresholds would be given highest priority for entry into the debates, followed by those with the highest polling average and those with the most donors. The pollsters and sponsors of polls designated for consideration by the DNC were the Associated Press, ABC News, CBS News, CNN, The Des Moines Register, Fox News, the Las Vegas Review-Journal, Monmouth University, NBC News, The New York Times, National Public Radio, Quinnipiac University, Reuters, the University of New Hampshire, USA Today, The Wall Street Journal, The Washington Post, and Winthrop University. Open-ended polls did not count towards the polling threshold. Only top-line polling results counted toward the threshold.
For the third and fourth primary debates, candidates were required to meet both polling and fundraising thresholds. Prior considerations were only polls between June 28 and August 28, 2019, and increased to 4 qualifying polls at 2% support, now excluding surveys sponsored by the Las Vegas Review-Journal and Reuters; the latter requirement was also increased, to 130,000 unique donors with at least 400 in 20 different states.
A total of 29 major candidates declared their candidacies for the primaries, the largest field of presidential primary candidates for any American political party since the modern primaries began in 1972, exceeding the field of 17 major candidates in the 2016 Republican Party presidential primaries.
Other individuals who were included in national Democratic primary polls but did not run for the 2020 nomination included Stacey Abrams, Michael Avenatti, Sherrod Brown, Hillary Clinton, Mark Cuban, Andrew Cuomo, Al Franken, Eric Garcetti, Eric Holder, Tim Kaine, Jason Kander, Joe Kennedy III, John Kerry, Mitch Landrieu, Terry McAuliffe, Chris Murphy, Gavin Newsom, Michelle Obama, Howard Schultz, Oprah Winfrey, and Mark Zuckerberg.

## Polling aggregation

The following graph depicts the standing of each candidate in the poll aggregators from January 2019 to August 2020.

## 2020
### April–August 2020

April–August 2020 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Bernie Sanders | Someone else | Would not vote | Undecided |
| | August 20 | Democratic National Convention ends | Democratic National Convention ends | Democratic National Convention ends | Democratic National Convention ends | Democratic National Convention ends | Democratic National Convention ends | Democratic National Convention ends |
| YouGov/Economist | Aug 16–18, 2020 | 559 (LV) | – | 59% | 33% | – | – | 7% |
| | August 11 | Connecticut primary | Connecticut primary | Connecticut primary | Connecticut primary | Connecticut primary | Connecticut primary | Connecticut primary |
| YouGov/Economist | Aug 9–11, 2020 | 587 (LV) | – | 59% | 33% | – | – | 8% |
| YouGov/Economist | Aug 2–4, 2020 | 527 (LV) | – | 61% | 32% | – | – | 7% |
| YouGov/Economist | Jul 26–28, 2020 | 576 (LV) | – | 60% | 33% | – | – | 7% |
| YouGov/Economist | Jul 19–21, 2020 | 557 (LV) | – | 61% | 32% | – | – | 7% |
| YouGov/Economist | Jul 12–14, 2020 | 598 (LV) | – | 58% | 35% | – | – | 8% |
| | July 12 | Puerto Rico primary | Puerto Rico primary | Puerto Rico primary | Puerto Rico primary | Puerto Rico primary | Puerto Rico primary | Puerto Rico primary |
| | July 11 | Louisiana primary | Louisiana primary | Louisiana primary | Louisiana primary | Louisiana primary | Louisiana primary | Louisiana primary |
| | July 7 | Delaware and New Jersey primaries | Delaware and New Jersey primaries | Delaware and New Jersey primaries | Delaware and New Jersey primaries | Delaware and New Jersey primaries | Delaware and New Jersey primaries | Delaware and New Jersey primaries |
| YouGov/Economist | Jul 5–7, 2020 | 559 (LV) | – | 57% | 34% | – | – | 10% |
| YouGov/Economist | Jun 28–30, 2020 | 605 (LV) | – | 59% | 34% | – | – | 7% |
| | June 23 | Kentucky and New York primaries | Kentucky and New York primaries | Kentucky and New York primaries | Kentucky and New York primaries | Kentucky and New York primaries | Kentucky and New York primaries | Kentucky and New York primaries |
| YouGov/Economist | Jun 21–23, 2020 | 561 (LV) | – | 57% | 37% | – | – | 6% |
| YouGov/Economist | Jun 14–16, 2020 | 541 (LV) | – | 60% | 33% | – | – | 7% |
| | June 9 | Georgia and West Virginia primaries | Georgia and West Virginia primaries | Georgia and West Virginia primaries | Georgia and West Virginia primaries | Georgia and West Virginia primaries | Georgia and West Virginia primaries | Georgia and West Virginia primaries |
| YouGov/Economist | Jun 7–9, 2020 | 649 (LV) | – | 56% | 38% | – | – | 7% |
| | June 6 | Guam and U.S. Virgin Islands caucuses | Guam and U.S. Virgin Islands caucuses | Guam and U.S. Virgin Islands caucuses | Guam and U.S. Virgin Islands caucuses | Guam and U.S. Virgin Islands caucuses | Guam and U.S. Virgin Islands caucuses | Guam and U.S. Virgin Islands caucuses |
| | June 5 | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee | Biden secures a majority of pledged delegates and becomes the presumptive Democratic nominee |
| | June 2 | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries | District of Columbia, Indiana, Maryland, Montana, New Mexico, Pennsylvania, Rhode Island and South Dakota Democratic primaries |
| YouGov/Economist | May 31–Jun 2 | 589 (LV) | – | 60% | 33% | – | – | 7% |
| Zogby/EMI/Washington Examiner | May 26 | < 1000 (LV) | – | 55% | – | 37% | – | – |
| | May 22 | Hawaii primary | Hawaii primary | Hawaii primary | Hawaii primary | Hawaii primary | Hawaii primary | Hawaii primary |
| | May 19 | Oregon primary | Oregon primary | Oregon primary | Oregon primary | Oregon primary | Oregon primary | Oregon primary |
| YouGov/Economist | May 17–19 | 581 (LV) | – | 62% | 33% | – | – | 5% |
| | May 12 | Nebraska primary | Nebraska primary | Nebraska primary | Nebraska primary | Nebraska primary | Nebraska primary | Nebraska primary |
| YouGov/Economist | May 10–12 | 602 (LV) | – | 57% | 36% | – | – | 7% |
| Rasmussen Reports | May 10–11 | < 1000 (LV) | – | 54% | – | 28% | – | 18% |
| YouGov/Economist | May 3–5 | 547 (LV) | – | 55% | 37% | – | – | 7% |
| Morning Consult | May 2–3 | 737 (RV) | ± 4% | 61% | – | 26% | – | 13% |
| | May 2 | Kansas primary | Kansas primary | Kansas primary | Kansas primary | Kansas primary | Kansas primary | Kansas primary |
| | Apr 28 | Ohio primary | Ohio primary | Ohio primary | Ohio primary | Ohio primary | Ohio primary | Ohio primary |
| Winston Group | Apr 27–28 | ≈670 (RV) | – | 54% | 17% | 2% | 18% | 8% |
| YouGov/Economist | Apr 26–28 | 563 (LV) | – | 59% | 32% | – | – | 9% |
| Emerson College | Apr 26–28 | 479 (RV) | – | 68% | 24% | 3% | 2% | 7% |
| YouGov/Economist | Apr 19–21 | 544 (LV) | – | 60% | 34% | – | – | 6% |
| | Apr 17 | Wyoming caucuses | Wyoming caucuses | Wyoming caucuses | Wyoming caucuses | Wyoming caucuses | Wyoming caucuses | Wyoming caucuses |
| YouGov/Economist | Apr 12–14 | 586 (LV) | – | 49% | 31% | 18% | – | 2% |
| | Apr 10 | Alaska primary | Alaska primary | Alaska primary | Alaska primary | Alaska primary | Alaska primary | Alaska primary |
| Zogby Analytics | Apr 8–9 | 679 (LV) | ± 3.8% | 61% | – | 30% | – | 9% |
| | Apr 8 | Sanders withdraws from the race | Sanders withdraws from the race | Sanders withdraws from the race | Sanders withdraws from the race | Sanders withdraws from the race | Sanders withdraws from the race | Sanders withdraws from the race |
| | Apr 7 | Wisconsin primary | Wisconsin primary | Wisconsin primary | Wisconsin primary | Wisconsin primary | Wisconsin primary | Wisconsin primary |
| YouGov/Economist | Apr 5–7 | 586 (LV) | – | 49% | 28% | 18% | – | 5% |
| CNN/SSRS | Apr 3–6 | 462 (RV) | ± 5.6% | 65% | 30% | 1% | – | 5% |
| Morning Consult | Mar 30–Apr 5 | 13,346 (LV) | ± 1.0% | 61% | 36% | 3% | – | – |
| Winston Group | Apr 1–3 | ≈670 (RV) | – | 48% | 27% | 2% | 14% | 10% |
| IBD/TIPP | Mar 29–Apr 1 | 447 (RV) | – | 62% | 30% | 3% | – | 5% |

### March 2020

March 2020 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Bernie Sanders | Tulsi Gabbard | Someone else | Would not vote | Undecided |
| YouGov/Economist | Mar 29–31 | 573 (LV) | – | 47% | 34% | – | 15% | – | 4% |
| HarrisX/The Hill | Mar 29–30 | 425 (RV) | ± 4.7% | 54% | 32% | – | 5% | – | 10% |
| Morning Consult | Mar 23–29 | 15,101 (LV) | ± 1.0% | 61% | 36% | – | 3% | – | – |
| Harvard-Harris | Mar 24–26 | 903 (RV) | – | 58% | 32% | – | – | 1% | 9% |
| ABC/Washington Post | Mar 22–25 | 388 (RV) | ± 5.5% | 55% | 39% | – | 2% | 5% | 1% |
| YouGov/Economist | Mar 22–24 | 545 (LV) | – | 47% | 34% | – | 16% | – | 3% |
| Echelon Insights | Mar 20–24 | 490 (LV) | – | 66% | 29% | – | – | – | – |
| Ipsos/Reuters | Mar 18–24 | 1,981 (A) | ± 2.5% | 53% | 34% | 2% | 2%% | 0% | 8% |
| Morning Consult | Mar 16–22 | 16,180 (LV) | ± 1.0% | 60% | 36% | – | 5% | – | – |
| | Mar 19 | Gabbard withdraws from the race | Gabbard withdraws from the race | Gabbard withdraws from the race | Gabbard withdraws from the race | Gabbard withdraws from the race | Gabbard withdraws from the race | Gabbard withdraws from the race | Gabbard withdraws from the race |
| Emerson College | Mar 18–19 | 519 (LV) | ± 4.3% | 54% | 42% | – | 4% | – | – |
| | Mar 17 | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries | Arizona, Florida, and Illinois primaries |
| YouGov/Economist | Mar 15–17 | 551 (LV) | – | 48% | 32% | – | 13% | – | 6% |
| Ipsos/Reuters | Mar 13–16 | 458 (RV) | ± 5.2% | 48% | 39% | 2% | 2% | 0% | 8% |
| | Mar 15 | Eleventh Democratic primary debate | Eleventh Democratic primary debate | Eleventh Democratic primary debate | Eleventh Democratic primary debate | Eleventh Democratic primary debate | Eleventh Democratic primary debate | Eleventh Democratic primary debate | Eleventh Democratic primary debate |
| HarrisX/The Hill | Mar 14–15 | 894 (RV) | ± 3.3% | 55% | 31% | 4% | 3% | – | 7% |
| | Mar 14 | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus | Northern Mariana Islands Democratic caucus |
| Morning Consult | Mar 11–15 | 8,869 (LV) | ± 1.0% | 58% | 37% | 3% | 3% | – |
| Winston Group | Mar 11–13 | ≈670 (RV) | – | 50% | 24% | 4% | 1% | 12% | 9% |
| NBC/WSJ | Mar 11–13 | 438 (LV) | ± 4.68% | 61% | 32% | 4% | – | 1% | 2% |
| Hofstra University | Mar 5–12 | 572 (LV) | ± 2.9% | 58% | 35% | 2% | 5% | – | – |
| Morning Consult | Mar 11 | 2,072 (LV) | ± 2.0% | 59% | 35% | 3% | 3% | – | – |
| | Mar 11 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 | COVID-19 declared a pandemic by the World Health Organization; national emergency declared on Mar 13 |
| | Mar 10 | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries | Democrats Abroad, Idaho, Michigan, Mississippi, Missouri, North Dakota, and Washington primaries |
| YouGov/Economist | Mar 8–10 | 573 (LV) | – | 53% | 38% | 2% | – | 1% | 6% |
| Chism Strategies | Mar 9 | 840 (LV) | ± 3.38% | 50% | 42% | 4% | 4% | – | 5% |
| HarrisX/The Hill | Mar 8–9 | 442 (RV) | ± 4.6% | 55% | 28% | 5% | 4% | – | 8% |
| Ipsos/Reuters | Mar 6–9 | 420 (RV) | ± 5.5% | 54% | 33% | 2% | 3% | 0% | 8% |
| Morning Consult | Mar 5–8 | 9,593 (LV) | ± 1.0% | 56% | 38% | 3% | 3% | – | – |
| Quinnipiac University | Mar 5–8 | 559 (RV) | ± 4.2% | 54% | 35% | 2% | 1% | – | 8% |
| CNN/SSRS | Mar 4–7 | 540 (RV) | ± 5% | 52% | 36% | – | 8% | – | 4% |
| Morning Consult | Mar 5 | 1,390 (LV) | ± 3.0% | 54% | 38% | 2% | 6% | – | – |
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Pete Buttigieg | Tulsi Gabbard | Amy Klobuchar | Bernie Sanders | Tom Steyer | Elizabeth Warren | Others | Would not vote | Undecided |
| | Mar 5 | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race | Warren withdraws from the race |
| Ipsos/Reuters | Mar 4–5 | 474 (RV) | ± 5.1% | 45% | – | – | 1% | – | 32% | – | 11% | 4% | 0% | 7% |
| | Mar 4 | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race | Bloomberg withdraws from the race |
| | Mar 3 | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday | Super Tuesday |
| Morning Consult | Mar 2–3 | 961 (LV) | ± 4.0% | 36% | 19% | – | – | – | 28% | – | 14% | 3% | – | – |
| YouGov/Economist | Mar 1–3 | 722 (LV) | – | 28% | 11% | 7% | 2% | 4% | 24% | – | 19% | – | – | – |
| | Mar 2 | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race | Klobuchar withdraws from the race |
| HarrisX/The Hill | Mar 1–2 | 453 (RV) | ± 4.6% | 28% | 20% | – | 2% | 3% | 23% | – | 11% | 2% | – | 10% |
| Ipsos/Reuters | Feb 28 – Mar 2 | 469 (RV) | – | 15% | 14% | 10% | 1% | 4% | 24% | 2% | 9% | 2% | 4% | 14% |
| | Mar 1 | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race | Buttigieg withdraws from the race |
| Morning Consult | Mar 1 | 2,656 (LV) | ± 2.0% | 26% | 17% | 10% | – | 3% | 29% | 1% | 11% | – | – | – |

### February 2020

February 2020 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Pete Buttigieg | Tulsi Gabbard | Amy Klobuchar | Bernie Sanders | Tom Steyer | Elizabeth Warren | Andrew Yang | Others | Would not vote | Undecided |
| | Feb 29 | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race | South Carolina primary; Steyer withdraws from the race |
| IBD/TIPP | Feb 20–29 | 325 (RV) | – | 20% | 13% | 7% | – | 6% | 23% | – | 17% | – | – | – | – |
| Harvard-Harris | Feb 26–28 | 925 (RV) | – | 20% | 18% | 10% | 1% | 2% | 25% | 3% | 11% | – | 1% | 2% | 7% |
| Morning Consult | Feb 26–27 | 5,334 (LV) | ± 1.0% | 21% | 17% | 10% | 2% | 4% | 33% | 3% | 11% | – | – | – | – |
| YouGov/Yahoo News | Feb 26–27 | – | – | 21% | 14% | 10% | 1% | 4% | 27% | 2% | 18% | – | – | – | – |
| Change Research | Feb 25–27 | 821 (LV) | – | 14% | 8% | 9% | 1% | 3% | 40% | 2% | 20% | – | – | – | – |
| SurveyUSA | Feb 25–26 | 825 (LV) | ± 3.6% | 21% | 21% | 9% | 1% | 4% | 28% | 2% | 8% | – | – | – | 5% |
| Fox News | Feb 23–26 | 1,000 (RV) | ± 4.0% | 18% | 16% | 12% | 1% | 5% | 31% | 2% | 10% | – | – | 1% | 4% |
| | Feb 25 | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate | Tenth Democratic primary debate |
| YouGov/Economist | Feb 23–25 | 584 (LV) | – | 20% | 11% | 9% | 4% | 4% | 30% | 1% | 16% | – | – | 1% | 4% |
| Ipsos/Reuters | Feb 19–25 | 1,808 (RV) | ± 2.6% | 17% | 16% | 11% | 1% | 4% | 29% | 3% | 12% | – | 1% | 1% | 6% |
| HarrisX/The Hill | Feb 23–24 | 470 (RV) | ± 4.5% | 17% | 19% | 12% | 2% | 3% | 28% | 3% | 8% | – | – | – | 8% |
| Morning Consult | Feb 23 | 2,631 (LV) | ± 2.0% | 18% | 19% | 11% | 2% | 4% | 32% | 3% | 11% | – | – | – | – |
| | Feb 22 | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses | Nevada caucuses |
| YouGov/CBS News | Feb 20–22 | 6,498 (LV) | ± 1.7% | 17% | 13% | 10% | 1% | 5% | 28% | 2% | 19% | – | 5% | – | – |
| Saint Leo University | Feb 17–22 | 310 (LV) | – | 25% | 16% | 6% | 2% | 3% | 26% | 2% | 9% | – | – | – | – |
| Morning Consult | Feb 20 | 2,609 (LV) | ± 2.0% | 19% | 17% | 11% | – | 5% | 30% | – | 12% | – | – | – | – |
| | Feb 19 | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate | Ninth Democratic primary debate |
| YouGov/Economist | Feb 16–18 | 555 (LV) | ± 3.0% | 18% | 12% | 11% | 2% | 7% | 24% | 2% | 16% | – | – | 2% | 5% |
| Emerson College | Feb 16–18 | 573 (LV) | ± 2.7% | 22% | 14% | 8% | 4% | 6% | 29% | 3% | 12% | – | 4% | – | – |
| ABC/Wash Post | Feb 14–17 | 408 (RV) | ± 3.5% | 16% | 14% | 8% | 1% | 7% | 32% | 2% | 12% | – | – | – | – |
| NBC/WSJ | Feb 14–17 | 426 (LV) | ± 4.8% | 15% | 14% | 13% | 1% | 7% | 27% | 2% | 14% | – | – | – | – |
| Ipsos/Reuters | Feb 14–17 | 543 (RV) | ± 5.0% | 13% | 17% | 11% | – | 5% | 25% | – | 9% | – | – | – | – |
| SurveyUSA | Feb 13–17 | 1,022 (LV) | ± 3.3% | 18% | 18% | 12% | – | 4% | 29% | 2% | 10% | – | 1% | – | 6% |
| Morning Consult | Feb 12–17 | 15,974 (LV) | ± 1.0% | 19% | 20% | 12% | 2% | 6% | 28% | 3% | 10% | – | 1% | – | – |
| Winston Group | Feb 15–16 | ≈670 (RV) | – | 13% | 16% | 9% | 2% | 6% | 23% | 3% | 9% | – | 1% | 9% | 10% |
| NPR/PBS NewsHour/Marist | Feb 13–16 | 1,164 (RV) | ± 3.7% | 15% | 19% | 8% | 0% | 9% | 31% | 2% | 12% | – | 0% | – | 5% |
| HarrisX/The Hill | Feb 14–15 | 449 (RV) | ± 4.6% | 19% | 18% | 10% | 0% | 6% | 22% | 3% | 12% | – | – | – | 8% |
| Zogby Analytics | Feb 13–14 | 732 (LV) | ± 3.6% | 18% | 20% | 9% | 3% | 5% | 24% | 4% | 10% | – | 2% | – | 6% |
| YouGov/GW Politics | Feb 3–14 | 437 (RV) | – | 21.5% | 9.4% | 10.5% | 1.4% | 3.1% | 20.3% | 1.1% | 14.9% | 4.1% | 1.1% | 3.5% | 8.9% |
| Morning Consult | Feb 12 | 2,639 (LV) | ± 2% | 19% | 18% | 11% | – | 5% | 29% | – | 10% | – | – | – | – |
| | Feb 11 | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race | New Hampshire primary; Yang withdraws from the race |
| YouGov/Economist | Feb 9–11 | 552 (LV) | – | 18% | 12% | 10% | 4% | 7% | 22% | 1% | 15% | 2% | – | 1% | 6% |
| McLaughlin & Associates | Feb 7–11 | 479 (LV) | – | 24% | 16% | 11% | 1% | 3% | 21% | 3% | 11% | 3% | 1% | – | 7% |
| HarrisX/The Hill | Feb 7–10 | 913 (RV) | ± 3.2% | 23% | 16% | 9% | 1% | 3% | 20% | 3% | 9% | 3% | 3% | – | 11% |
| Ipsos/Reuters | Feb 6–10 | 556 (RV) | ± 3.6% | 17% | 15% | 8% | 1% | 3% | 20% | 2% | 11% | 5% | 2% | 3% | 14% |
| Monmouth University | Feb 6–9 | 357 (RV) | ± 5.2% | 16% | 11% | 13% | 1% | 6% | 26% | 1% | 13% | 4% | 0% | 2% | 5% |
| Quinnipiac University | Feb 5–9 | 665 (RV) | ± 3.8% | 17% | 15% | 10% | 1% | 4% | 25% | 1% | 14% | 2% | 1% | 1% | 10% |
| Morning Consult | Feb 4–9 | 15,348 (LV) | ± 1% | 22% | 17% | 11% | 1% | 3% | 25% | 3% | 11% | 4% | 2% | – | – |
| | Feb 7 | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate | Eighth Democratic primary debate |
| Morning Consult | Feb 5 | 2,500 (LV) | ± 2.0% | 24% | 15% | 12% | – | 3% | 25% | 3% | 11% | 5% | – | – | – |
| Morning Consult | Feb 4–5 | 891 (LV) | ± 3% | 25% | 14% | 10% | 2% | 3% | 22% | 3% | 13% | 4% | 1% | – | 4% |
| Morning Consult | Feb 4 | 2,500 (LV) | ± 2.0% | 27% | 16% | 9% | – | 3% | 24% | 3% | 11% | 5% | – | – | – |
| YouGov/Economist | Feb 2–4 | 616 (LV) | – | 24% | 9% | 9% | 3% | 6% | 19% | 2% | 18% | 3% | 1% | 1% | 6% |
| Morning Consult | Feb 3 | 2,500 (LV) | ± 2.0% | 29% | 16% | 7% | – | 3% | 22% | 2% | 13% | 5% | – | – | – |
| | Feb 3 | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses | Iowa caucuses |
| Ipsos/Reuters | Jan 31 – Feb 3 | 551 (RV) | – | 22% | 9% | 5% | 1% | 4% | 19% | 3% | 10% | 4% | 2% | 4% | 17% |
| Winston Group | Jan 31 – Feb 2 | ≈670 (RV) | – | 20% | 13% | 5% | 2% | 3% | 17% | 2% | 8% | 5% | 4% | 9% | 9% |
| Atlas Intel | Jan 30 – Feb 2 | 532 (LV) | ± 4.0% | 24% | 8% | 5% | 3% | 2% | 28% | – | 11% | 3% | – | – | 12% |
| Morning Consult | Jan 27 – Feb 2 | 15,259 (LV) | ± 1% | 28% | 14% | 6% | 2% | 3% | 24% | 3% | 14% | 4% | 3% | – | – |

### January 2020

January 2020 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Pete Buttigieg | Amy Klobuchar | Bernie Sanders | Tom Steyer | Elizabeth Warren | Andrew Yang | Other | Undecided |
| Ipsos/Reuters | Jan 29–30 | 565 (RV) | ± 5.0% | 23% | 12% | 4% | 2% | 18% | 4% | 10% | 4% | 1% | – |
| IBD/TIPP | Jan 23–30 | 336 (RV) | – | 26% | 8% | 7% | 3% | 19% | 2% | 13% | 4% | 7% | 11% |
| Harvard-Harris | Jan 27–29 | 980 (RV) | – | 31% | 13% | 6% | 3% | 20% | 2% | 12% | 3% | 6% | 7% |
| NBC/WSJ | Jan 26–29 | 428 (LV) | ± 4.74% | 26% | 9% | 7% | 5% | 27% | 2% | 15% | 4% | 3% | 2% |
| YouGov/Economist | Jan 26–28 | 591 (LV) | – | 26% | 4% | 7% | 4% | 24% | 1% | 20% | 4% | 5% | 4% |
| USC Dornlife/LA Times Archived December 8, 2020, at the Wayback Machine | Jan 15–28 | 2,227 (LV) | ± 2% | 34% | 9% | 9% | 3% | 18% | 2% | 16% | 2% | 3% | 3% |
| Quinnipiac University | Jan 22–27 | 827 (RV) | ± 3.4% | 26% | 8% | 6% | 7% | 21% | 2% | 15% | 3% | 2% | 11% |
| YouGov Blue/Data for Progress | Jan 18–27 | 1,619 (LV) | ± 2.6% | 30% | 5% | 8% | 4% | 21% | 2% | 23% | 4% | 2% | – |
| Morning Consult | Jan 20–26 | 17,836 (LV) | ± 1.0% | 29% | 12% | 7% | 3% | 23% | 3% | 14% | 5% | 4% | – |
| YouGov Blue/Data for Progress | Jan 18–26 | 1,619 (LV) | ± 2.6% | 42% | – | – | – | 23% | – | 30% | – | – | – |
| Ipsos/Reuters | Jan 22–23 | 545 (RV) | ± 5.0% | 24% | 10% | 7% | 3% | 20% | 2% | 12% | 3% | 1% | – |
| Emerson College | Jan 21–23 | 497 (LV) | ± 4.1% | 30% | 7% | 6% | 4% | 27% | 1% | 13% | 8% | 4% | – |
| Echelon Insights | Jan 20–23 | 474 (LV) | – | 26% | 13% | 7% | 3% | 23% | 2% | 10% | 3% | 3% | 10% |
| Washington Post/ABC News | Jan 20–23 | 276 (LV) | – | 34% | 7% | 4% | 4% | 22% | 1% | 14% | 6% | 6% | 3% |
| Winston Group | Jan 21–22 | ≈670 (RV) | – | 20% | 9% | 6% | 4% | 16% | 3% | 9% | 5% | 18% | 11% |
| HarrisX/The Hill | Jan 20–22 | 878 (RV) | ±3.3% | 29% | 11% | 5% | 2% | 17% | 4% | 9% | 4% | 8% | 11% |
| Fox News | Jan 19–22 | 495 (LV) | ± 4.0% | 26% | 10% | 7% | 3% | 23% | 3% | 14% | 5% | 2% | 5% |
| YouGov/Economist | Jan 19–21 | 470 (RV) | – | 28% | 6% | 8% | 4% | 18% | 2% | 21% | 3% | 4% | 5% |
| Monmouth University | Jan 16–20 | 372 (LV) | ± 5.1% | 30% | 9% | 6% | 5% | 23% | 1% | 14% | 3% | 3% | 6% |
| CNN/SSRS | Jan 16–19 | 500 (RV) | ± 5.3% | 24% | 5% | 11% | 4% | 27% | 2% | 14% | 4% | 3% | 5% |
| Morning Consult | Jan 15–19 | 12,402 (LV) | ± 1.0% | 29% | 10% | 8% | 3% | 24% | 3% | 15% | 4% | 5% | – |
| Pew Research Center* | Jan 6–19 | 5,861 (RV) | ±1.9% | 26% | 5% | 7% | 2% | 21% | 1% | 16% | 3% | 13% | 5% |
| Zogby Analytics | Jan 15–16 | 438 (LV) | – | 24% | 11% | 8% | 4% | 24% | 3% | 11% | 6% | 4% | 6% |
| Ipsos/Reuters | Jan 15–16 | 428 (RV) | ± 5.4% | 23% | 11% | 7% | 2% | 22% | 1% | 14% | 3% | 3% | 13% |
| SurveyUSA | Jan 14–16 | 1,086 (LV) | ± 3.6% | 32% | 9% | 9% | 2% | 21% | 3% | 14% | 4% | 3% | 3% |
| | Jan 14 | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate | Seventh Democratic primary debate |
| HarrisX/The Hill | Jan 13–14 | 451 (RV) | ± 4.6% | 29% | 7% | 4% | 3% | 19% | 3% | 11% | 2% | 5% | 15% |
| YouGov/Economist | Jan 11–14 | 521 (LV) | – | 27% | 5% | 7% | 3% | 20% | 1% | 19% | 3% | 4% | 6% |
| | Jan 13 | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race | Booker withdraws from the race |
| Quinnipiac University | Jan 8–12 | 651 (RV) | ± 3.8% | 25% | 6% | 8% | 4% | 19% | 1% | 16% | 5% | 5% | 11% |
| Morning Consult | Jan 6–12 | 17,096 (LV) | ± 1.0% | 29% | 8% | 8% | 3% | 23% | 4% | 14% | 5% | 7% | – |
| IBD/TIPP | Jan 3–11 | 333 (RV) | – | 26% | 7% | 9% | 3% | 15% | 2% | 20% | 3% | 7% | 9% |
| Ipsos/Reuters | Jan 8–9 | 436 (RV) | ± 5.4% | 23% | 8% | 7% | 1% | 20% | 3% | 15% | 3% | 6% | 13% |
| YouGov/Economist | Jan 5–7 | 574 (LV) | – | 27% | 3% | 7% | 3% | 20% | 2% | 22% | 3% | 6% | 5% |
| Morning Consult | Dec 30, 2019 – Jan 5, 2020 | 17,213 (LV) | ± 1.0% | 31% | 7% | 8% | 3% | 23% | 4% | 14% | 4% | 8% | – |

## 2019
### December 2019

December 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Cory Booker | Pete Buttigieg | Tulsi Gabbard | Amy Klobuchar | Bernie Sanders | Tom Steyer | Elizabeth Warren | Andrew Yang | Other | Undecided |
| YouGov/Economist | Dec 28–31 | 548 (LV) | – | 29% | 3% | 2% | 8% | 3% | 4% | 19% | 2% | 18% | 3% | 3% | 6% |
| Winston Group | Dec 28–30 | ≈670 (RV) | – | 28% | 7% | 3% | 5% | 1% | 3% | 11% | 2% | 9% | 3% | 14% | 13% |
| Harvard-Harris | Dec 27–29 | 780 (RV) | – | 30% | 7% | 2% | 7% | 1% | 2% | 17% | 2% | 12% | 3% | 7% | 10% |
| Morning Consult | Dec 23–29 | 17,787 (LV) | ± 1.0% | 32% | 6% | 3% | 8% | 1% | 3% | 21% | 3% | 14% | 4% | 5% | – |
| The Hill/HarrisX | Dec 27–28 | 431 (RV) | ± 4.7% | 28% | 11% | 2% | 6% | 2% | 2% | 16% | 2% | 11% | 2% | 4% | 12% |
| YouGov/Economist | Dec 22–24 | 586 (LV) | – | 30% | 4% | 2% | 7% | 2% | 5% | 17% | 1% | 19% | 3% | 5% | 5% |
| Taubmann Center | Dec 19–23 | 412 (LV) | – | 34% | 4% | 3% | 7% | 4% | 2% | 19% | – | 20% | 4% | 4% | – |
| Morning Consult | Dec 20–22 | 7,178 (LV) | ± 1.0% | 31% | 6% | 3% | 9% | 2% | 3% | 21% | 3% | 15% | 5% | 5% | – |
| | Dec 19 | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate | Sixth Democratic primary debate |
| Ipsos/Reuters | Dec 18–19 | 709 (A) | – | 18% | 5% | 1% | 4% | 2% | 1% | 15% | 2% | 10% | 2% | 8% | 29% |
| McLaughlin & Associates | Dec 14–18 | 480 (LV) | – | 27% | 5% | 3% | 5% | 2% | 2% | 17% | 4% | 15% | 5% | 5% | 11% |
| Emerson College | Dec 15–17 | 525 (LV) | ± 4.2% | 32% | 3% | 2% | 8% | 4% | 2% | 25% | 2% | 12% | 6% | 2% | – |
| NBC/WSJ | Dec 14–17 | 410 (LV) | ± 4.84% | 28% | 4% | 2% | 9% | 2% | 5% | 21% | 1% | 18% | 3% | 2% | 5% |
| YouGov/Economist | Dec 14–17 | 555 (LV) | – | 29% | 4% | 2% | 7% | 3% | 4% | 19% | 2% | 17% | 3% | 6% | 4% |
| CNN/SSRS | Dec 12–15 | 408 (RV) | ± 5.8% | 26% | 5% | 3% | 8% | 1% | 3% | 20% | 1% | 16% | 3% | 6% | 8% |
| Quinnipiac University | Dec 11–15 | 567 (RV) | ± 4.1% | 30% | 7% | 2% | 9% | 1% | 3% | 16% | 1% | 17% | 3% | 1% | 10% |
| Morning Consult | Dec 9–15 | 13,384 (LV) | ± 1.0% | 31% | 7% | 3% | 8% | 2% | 2% | 22% | 3% | 15% | 4% | 5% | – |
| HarrisX/The Hill | Dec 13–14 | 456 (RV) | ± 4.6% | 29% | 5% | 2% | 5% | 1% | 3% | 13% | 3% | 13% | 3% | 9% | 13% |
| Suffolk University/USA Today | Dec 10–14 | 384 (LV) | – | 23% | 6% | 3% | 8% | 1% | 3% | 14% | 1% | 13% | 2% | 1% | 25% |
| Echelon Insights | Dec 9–14 | 447 (LV) | – | 37% | 6% | 1% | 6% | 1% | 2% | 14% | 1% | 14% | 2% | 3% | 13% |
| IBD/TIPP | Dec 5–14 | 312 (RV) | – | 26% | 5% | 3% | 9% | 1% | 2% | 18% | 2% | 14% | 2% | 10% | 10% |
| Ipsos/Reuters | Dec 11–12 | 593 (RV) | – | 21% | 7% | – | 5% | 1% | 2% | 18% | 3% | 11% | 3% | 6% | 18% |
| NPR/PBS NewsHour/Marist | Dec 9–11 | 704 (RV) | ± 5.4% | 24% | 4% | 4% | 13% | 1% | 4% | 22% | <1% | 17% | 5% | 2% | 5% |
| Fox News | Dec 8–11 | 1,000 (RV) | ± 4.5% | 30% | 5% | 2% | 7% | 3% | 5% | 20% | 1% | 13% | 3% | 5% | 7% |
| YouGov/Economist | Dec 7–10 | 497 (LV) | – | 26% | 4% | 3% | 11% | 3% | 2% | 16% | 1% | 21% | 3% | 4% | 6% |
| Quinnipiac University | Dec 4–9 | 665 (RV) | ± 3.8% | 29% | 5% | 1% | 9% | 2% | 3% | 17% | 1% | 15% | 4% | 5% | 11% |
| Zogby Analytics | Dec 5–8 | 443 (LV) | ± 4.7% | 30% | 8% | – | 7% | 3% | 2% | 20% | 3% | 16% | 4% | 3% | 6% |
| Monmouth University | Dec 4–8 | 384 (RV) | ± 5% | 26% | 5% | 2% | 8% | <1% | 4% | 21% | 1% | 17% | 3% | 5% | 11% |
| Morning Consult | Dec 2–8 | 15,442 (LV) | ± 1.0% | 30% | 6% | 3% | 9% | 2% | 2% | 22% | 3% | 16% | 4% | 5% | – |
| Ipsos/Reuters | Dec 4–5 | 596 (A) | – | 19% | 4% | 1% | 6% | 0% | 1% | 14% | 1% | 9% | 3% | 5% | 31% |
| | Dec 3 | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race | Harris withdraws from the race |
| YouGov/Economist | Dec 1–3 | 541 (LV) | – | 27% | 3% | 3% | 12% | 2% | 3% | 13% | 0% | 18% | 2% | 8% | 7% |
| The Hill/HarrisX | Nov 30 – Dec 1 | 437 (RV) | – | 31% | 6% | 1% | 9% | 0% | 2% | 15% | 2% | 10% | 2% | 8% | 13% |
| David Binder Research | Nov 25 – Dec 1 | 1,200 (LV) | ± 2.8% | 29% | 8% | 2% | 10% | 2% | 2% | 15% | 2% | 14% | 2% | 8% | 7% |
| Morning Consult | Nov 25 – Dec 1 | 15,773 (LV) | ± 1.0% | 29% | 5% | 2% | 9% | 2% | 2% | 20% | 2% | 15% | 4% | 11% | – |

### November 2019

November 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Pete Buttigieg | Kamala Harris | Amy Klobuchar | Bernie Sanders | Elizabeth Warren | Andrew Yang | Other | Undecided |
| Harvard-Harris | Nov 27–29 | 756 (RV) | – | 29% | 7% | 8% | 5% | 2% | 16% | 13% | 3% | 10% | 8% |
| YouGov/Economist | Nov 24–26 | 550 (LV) | – | 23% | 3% | 12% | 4% | 3% | 15% | 17% | 3% | 10% | 8% |
| Quinnipiac University | Nov 21–25 | 574 (RV) | ± 4.9% | 24% | 3% | 16% | 3% | 3% | 13% | 14% | 2% | 8% | 11% |
| | Nov 24 | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy | Bloomberg announces his candidacy |
| CNN/SSRS | Nov 21–24 | 431 (RV) | – | 28% | 3% | 11% | 3% | 2% | 17% | 14% | 3% | 7% | 8% |
| CNN/SSRS | Nov 21–24 | 431 (RV) | – | 35% | – | 17% | – | – | 23% | 20% | – | 3% | 2% |
| Morning Consult | Nov 21–24 | 8,102 (LV) | ± 1.0% | 30% | 2% | 9% | 5% | 2% | 21% | 15% | 4% | 13% | – |
| Ipsos/Reuters | Nov 21–22 | 698 (A) | ± 5.0% | 21% | – | 7% | 2% | 2% | 17% | 11% | 5% | 8% | 20% |
| SurveyUSA | Nov 20–21 | 1,088 (LV) | ± 3.6% | 30% | 3% | 11% | 5% | 2% | 17% | 15% | 4% | 9% | 4% |
| SurveyUSA | Nov 20–21 | 1,088 (LV) | ± 3.6% | 32% | – | 12% | 5% | 2% | 17% | 16% | 4% | 9% | 4% |
| RealClear Opinion Research | Nov 15–21 | 987 (LV) | – | 30% | 2% | 6% | 4% | 1% | 23% | 12% | 4% | 9% | 7% |
| | Nov 20 | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate | Fifth Democratic primary debate |
| Emerson College | Nov 17–20 | 468 (LV) | ± 4.5% | 27% | 1% | 7% | 3% | 1% | 27% | 20% | 4% | 10% | – |
| Change Research/Election Science | Nov 16–20 | 1,142 (LV) | ± 2.9% | 22% | 1% | 14% | 4% | 2% | 23% | 23% | 4% | 7% | 0% |
| YouGov/Economist | Nov 17–19 | 586 (LV) | – | 30% | – | 9% | 4% | 2% | 12% | 22% | 2% | 7% | 7% |
| Swayable | Nov 16–18 | 1,787 (LV) | ± 2.0% | 30% | – | 7% | 5% | 2% | 17% | 18% | 4% | 9% | – |
| The Hill/HarrisX | Nov 16–17 | 449 (RV) | ± 4.6% | 30% | 3% | 7% | 4% | 1% | 18% | 15% | 2% | 9% | 10% |
| Morning Consult | Nov 11–17 | 17,050 (LV) | ± 1.0% | 32% | 3% | 8% | 5% | 2% | 20% | 17% | 3% | 11% | – |
| Ipsos/Reuters | Nov 12–14 | 685 (A) | – | 19% | 3% | 6% | 3% | 1% | 19% | 13% | 2% | 15% | 18% |
| Ipsos/Reuters | Nov 12–14 | 702 (A) | – | 23% | – | 6% | 5% | 1% | 18% | 11% | 2% | 9% | 21% |
| YouGov/Economist | Nov 10–12 | 600 (LV) | – | 23% | – | 9% | 5% | 2% | 17% | 26% | 4% | 8% | 4% |
| Morning Consult | Nov 4–10 | 16,400 (LV) | ± 1.0% | 32% | 2% | 8% | 5% | 2% | 20% | 19% | 3% | 12% | – |
| Ipsos/Reuters | Nov 6–7 | 538 (RV) | – | 20% | – | 5% | – | 1% | 16% | 13% | 3% | 11% | 23% |
| YouGov/Economist | Nov 3–5 | 579 (LV) | – | 26% | – | 8% | 6% | 2% | 14% | 25% | 1% | 12% | 6% |
| Ipsos/Reuters | Nov 1–4 | 686 (A) | – | 22% | – | 6% | 4% | 0% | 15% | 11% | 2% | 7% | 25% |
| Change Research/Crooked Media | Oct 31 – Nov 3 | 456 (LV) | – | 17% | – | 14% | 4% | 2% | 17% | 21% | 4% | 6% | 14% |
| Monmouth University | Oct 30 – Nov 3 | 345 (RV) | ± 5.3% | 23% | – | 9% | 5% | 2% | 20% | 23% | 3% | 6% | 7% |
| Morning Consult | Oct 28 – Nov 3 | 16,071 (LV) | ± 1.0% | 32% | – | 7% | 5% | 2% | 20% | 20% | 3% | 12% | – |
| USC Dornsife/ Los Angeles Times | Oct 21 – Nov 3 | 2,599 (LV) | ± 2.0% | 28% | – | 6% | 4% | 2% | 13% | 16% | 2% | 6% | 21% |
| The Hill/HarrisX | Nov 1–2 | 429 (RV) | ± 4.7% | 26% | – | 6% | 6% | 3% | 14% | 15% | 1% | 11% | 16% |
| | Nov 1 | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race | O'Rourke withdraws from the race |

### October 2019

October 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Cory Booker | Pete Buttigieg | Tulsi Gabbard | Kamala Harris | Amy Klobuchar | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Andrew Yang | Other | Undecided |
| Harvard-Harris | Oct 29–31 | 640 (RV) | – | 33% | 3% | 4% | 0% | 5% | 3% | 2% | 18% | 15% | 2% | 5% | 8% |
| Hofstra University/YouGov | Oct 25–31 | 541 (LV) | – | 28% | 3% | 8% | 2% | 5% | 2% | 1% | 12% | 27% | 2% | 3% | 8% |
| IBD/TIPP | Oct 24–31 | 361 (RV) | – | 29% | 1% | 7% | 0% | 2% | 3% | 1% | 13% | 23% | 3% | 4% | 13% |
| Fox News | Oct 27–30 | 471 (LV) | ± 4.5% | 31% | 2% | 7% | 2% | 3% | 2% | 2% | 19% | 21% | 3% | 2% | 4% |
| Fox News | Oct 27–30 | 471 (LV) | ± 4.5% | – | – | – | – | – | – | – | – | – | – | 38% | 62% |
| NBC News/Wall Street Journal | Oct 27–30 | 414 (LV) | ± 4.8% | 27% | 2% | 6% | 2% | 4% | 5% | 1% | 19% | 23% | 3% | 3% | 5% |
| ABC News/Washington Post | Oct 27–30 | 452 (A) | ± 5.5% | 27% | 2% | 7% | 2% | 2% | 1% | 1% | 19% | 21% | 2% | 9–10% | 6% |
| YouGov/Economist | Oct 27–29 | 630 (LV) | – | 27% | 1% | 8% | 2% | 4% | 2% | 4% | 14% | 23% | 3% | 6% | 7% |
| Swayable | Oct 26–27 | 2,172 (LV) | ± 2.0% | 29% | 3% | 6% | 2% | 4% | 2% | 3% | 17% | 19% | 3% | 8% | – |
| Morning Consult | Oct 21–27 | 16,186 (LV) | ± 1.0% | 32% | 2% | 7% | 2% | 6% | 2% | 2% | 20% | 20% | 3% | 7% | – |
| Suffolk University/USA Today | Oct 23–26 | 399 (LV) | ± 4.9% | 26% | 2% | 10% | 4% | 3% | 2% | 0% | 13% | 17% | 3% | 4% | 18% |
| Echelon Insights | Oct 21–25 | 449 (RV) | – | 32% | 2% | 6% | 1% | 5% | 2% | 1% | 15% | 22% | 1% | 3% | 11% |
| The Hill/HarrisX | Oct 21–22 | 1,001 (RV) | ± 3.1% | 27% | 1% | 6% | 0% | 5% | 1% | 3% | 14% | 19% | 2% | 7% | 13% |
| YouGov/Economist | Oct 20–22 | 628 (LV) | – | 24% | 2% | 8% | 3% | 5% | 1% | 2% | 15% | 21% | 3% | 5% | 6% |
| McLaughlin & Associates | Oct 17–22 | 468 (LV) | – | 28% | 3% | 3% | 2% | 6% | 2% | 3% | 18% | 16% | 6% | 5% | 15% |
| Winston Group | Oct 18 – 21 | ≈670 (RV) | – | 27% | 1% | 5% | 2% | 3% | 1% | 2% | 10% | 17% | 3% | 15% | 13% |
| Emerson College | Oct 18–21 | 430 (RV) | ± 4.7% | 27% | 3% | 6% | 3% | 5% | 1% | 2% | 25% | 21% | 4% | 3% | – |
| Quinnipiac University | Oct 17–21 | 713 (RV) | ± 4.6% | 21% | 1% | 10% | 1% | 5% | 3% | 1% | 15% | 28% | 1% | 3% | 9% |
| CNN/SSRS | Oct 17–20 | 424 (RV) | ± 5.8% | 34% | 1% | 6% | 1% | 6% | 3% | 3% | 16% | 19% | 2% | 3% | 6% |
| Morning Consult | Oct 16–20 | 11,521 (LV) | ± 1.0% | 30% | 3% | 6% | 1% | 6% | 2% | 3% | 18% | 21% | 3% | 8% | – |
| Ipsos/Reuters | Oct 17–18 | 566 (RV) | – | 24% | 1% | 5% | 2% | 4% | 1% | 3% | 15% | 17% | 2% | 9% | 16% |
| HarrisX | Oct 11–18 | 1,839 (LV) | ± 2.3% | 34% | 2% | 4% | 1% | 5% | 2% | 3% | 16% | 18% | 2% | 4% | 10% |
| Morning Consult | Oct 16 | 2,202 (LV) | ± 2.0% | 31% | 2% | 6% | 1% | 7% | 2% | 2% | 18% | 21% | 3% | 9% | – |
| SurveyUSA | Oct 15–16 | 1,017 (LV) | ± 3.7% | 32% | 2% | 5% | 1% | 7% | 2% | 2% | 17% | 22% | 2% | 2% | 4% |
| | Oct 15 | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate | Fourth Democratic primary debate |
| YouGov/Economist | Oct 13–15 | 623 (LV) | – | 25% | 2% | 6% | 2% | 5% | 2% | 2% | 13% | 28% | 2% | 3% | 6% |
| Quinnipiac University | Oct 11–13 | 505 (RV) | ± 5.3% | 27% | 2% | 8% | <0.5% | 4% | 2% | 2% | 11% | 30% | 2% | 4% | 8% |
| Public Religion Research Institute | Oct 10–13 | 436 (RV) | – | 25% | 3% | 4% | 1% | 7% | 1% | 1% | 17% | 16% | 3% | 3% | 19% |
| Morning Consult | Oct 7–13 | 15,683 (LV) | ± 1.0% | 32% | 2% | 5% | 1% | 6% | 1% | 3% | 19% | 21% | 3% | 9% | – |
| YouGov/Taubman National Poll | Oct 10–11 | 468 (LV) | – | 25% | 1% | 6% | 5% | 4% | 1% | 3% | 13% | 23% | 11% | 8% | – |
| HarrisX | Oct 4–11 | 1,841 (LV) | ± 2.3% | 35% | 2% | 5% | 1% | 6% | 1% | 3% | 15% | 18% | 2% | 4% | 8% |
| Swayable | Oct 7–8 | 2,077 (LV) | ± 2.0% | 33% | 3% | 4% | 1% | 5% | 2% | 3% | 16% | 21% | 3% | 5% | – |
| Fox News | Oct 6–8 | 484 (LV) | ± 4.5% | 32% | 2% | 4% | 1% | 5% | 2% | 3% | 17% | 22% | 2% | 5% | 4% |
| YouGov/Economist | Oct 6–8 | 598 (LV) | – | 25% | 1% | 5% | 1% | 5% | 2% | 1% | 13% | 28% | 3% | 6% | 8% |
| The Hill/HarrisX | Oct 6–7 | 446 (RV) | ± 4.6% | 31% | 1% | 4% | 1% | 6% | 2% | 4% | 17% | 15% | 2% | 6% | 12% |
| Quinnipiac University | Oct 4–7 | 646 (RV) | ± 4.7% | 26% | 2% | 4% | 0% | 3% | 2% | 1% | 16% | 29% | 3% | 3% | 8% |
| Morning Consult | Sep 30 – Oct 6 | 16,529 (LV) | ± 1.0% | 33% | 2% | 5% | 1% | 6% | 1% | 3% | 19% | 21% | 3% | 9% | – |
| Avalanche Strategy/Civiqs | Oct 1–4 | 1,043 (LV) | – | 27% | – | 7% | – | 6% | – | – | 12% | 29% | – | – | – |
| Raycroft Research | Oct 1–4 | 7,402 (LV) | – | 18% | 2% | 4% | – | 3% | 1% | 6% | 17% | 26% | 6% | 17% | – |
| HarrisX | Sep 27 – Oct 4 | 1,815 (LV) | ± 2.3% | 35% | 2% | 4% | 1% | 6% | 1% | 2% | 13% | 19% | 2% | 5% | 9% |
| YouGov Blue/ Data for Progress | Sep 23 – Oct 4 | 1,276 (LV) | – | 23% | 2% | 6% | 1% | 5% | 1% | 2% | 15% | 36% | 3% | 1% | – |
| IBD/TIPP | Sep 26 – Oct 3 | 341 (RV) | – | 26% | 0% | 7% | 1% | 3% | 1% | 2% | 10% | 27% | 3% | 2% | 16% |
| Winston Group | Sep 30 – Oct 2 | ≈670 (RV) | – | 29% | 1% | 4% | 1% | 4% | 1% | 2% | 12% | 11% | 1% | 23% | 10% |
| YouGov/Economist | Sep 28 – Oct 1 | 602 (LV) | – | 22% | 2% | 7% | 2% | 5% | 1% | 3% | 14% | 26% | 3% | 4% | 8% |

### August 2019

August 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Cory Booker | Pete Buttigieg | Kamala Harris | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Andrew Yang | Other | Undecided |
| HarrisX | Aug 23–30 | 3,114 (RV) | – | 31% | 3% | 3% | 6% | 3% | 15% | 11% | 2% | 12% | 12% |
| IBD/TIPP | Aug 22–30 | 360 (RV) | – | 28% | 4% | 5% | 6% | 0% | 12% | 24% | 1% | 3% | 15% |
| Claster Consulting | Aug 28–29 | 752 (RV) | | 22% | 3% | 3% | 5% | 4% | 19% | 14% | 2% | 10% | 21% |
| Harvard-Harris | Aug 26–28 | 985 (RV) | | 32% | 3% | 4% | 7% | 4% | 16% | 13% | 2% | 6% | 11% |
| YouGov/Economist | Aug 24–27 | 1093 (RV) | ± 3.1% | 25% | 2% | 5% | 8% | 2% | 14% | 21% | 2% | 8% | 12% |
| Emerson College | Aug 24–26 | 627 (RV) | ± 3.9% | 31% | 3% | 3% | 10% | 2% | 24% | 15% | 4% | 8% | – |
| Change Research | Aug 23–26 | 874 (LV) | ± 3.3% | 19% | 3% | 9% | 6% | 3% | 22% | 29% | 2% | 7% | – |
| Quinnipiac University | Aug 21–26 | 648 (RV) | ± 4.6% | 32% | 1% | 5% | 7% | 1% | 15% | 19% | 3% | 6% | 11% |
| Suffolk University/ USA Today | Aug 20–25 | 424 (LV) | ± 4.8% | 32% | 2% | 6% | 6% | 2% | 12% | 14% | 3% | 2% | 21% |
| Morning Consult | Aug 19–25 | 17,303 (LV) | ± 1.0% | 33% | 3% | 5% | 8% | 3% | 20% | 15% | 2% | 9% | – |
| The Hill/HarrisX | Aug 23–24 | 465 (RV) | – | 30% | 2% | 4% | 4% | 3% | 17% | 14% | 2% | 9% | 15% |
| Swayable | Aug 22–23 | 1,849 (LV) | ± 2.0% | 33% | 2% | 3% | 9% | 4% | 18% | 16% | 1% | 6% | – |
| HarrisX | Aug 16–23 | 3,132 (RV) | – | 28% | 4% | 3% | 8% | 4% | 17% | 10% | 2% | 10% | 13% |
| Echelon Insights | Aug 19–21 | 479 (RV) | – | 30% | 4% | 3% | 11% | 4% | 19% | 11% | 1% | 1% | 14% |
| YouGov/Economist | Aug 17–20 | 559 (LV) | – | 22% | 2% | 7% | 8% | 3% | 19% | 17% | 1% | 7% | 12% |
| Monmouth University | Aug 16–20 | 298 (RV) | ± 5.7% | 19% | 4% | 4% | 8% | 2% | 20% | 20% | 3% | 7% | 10% |
| CNN/SSRS | Aug 15–18 | 402 (RV) | ± 6.1% | 29% | 2% | 5% | 5% | 3% | 15% | 14% | 1% | 10% | 10% |
| Morning Consult | Aug 12–18 | 17,115 (LV) | – | 31% | 3% | 5% | 9% | 3% | 20% | 15% | 3% | 8% | – |
| HarrisX | Aug 9–16 | 3,118 (RV) | – | 29% | 2% | 4% | 7% | 4% | 15% | 11% | 2% | 10% | 13% |
| Fox News | Aug 11–13 | 483 (LV) | ± 4.5% | 31% | 3% | 3% | 8% | 2% | 10% | 20% | 3% | 10% | 8% |
| YouGov/Economist | Aug 10–13 | 592 (LV) | – | 21% | 2% | 5% | 8% | 5% | 16% | 20% | 1% | 8% | 11% |
| Morning Consult | Aug 5–11 | 17,117 (LV) | ± 1.0% | 33% | 3% | 5% | 9% | 3% | 20% | 14% | 2% | 13% | – |
| The Hill/HarrisX | Aug 9–10 | 451 (RV) | – | 31% | 1% | 4% | 7% | 4% | 16% | 10% | 1% | 14% | 10% |
| HarrisX | Aug 2–9 | 3,088 (RV) | – | 28% | 3% | 4% | 7% | 3% | 16% | 10% | 1% | 12% | 16% |
| Swayable | Aug 5–6 | 1,958 (LV) | ± 2.0% | 31% | 3% | 5% | 9% | 3% | 17% | 15% | 2% | 5% | – |
| YouGov/Economist | Aug 3–6 | 573 (LV) | – | 22% | 1% | 8% | 8% | 2% | 13% | 16% | 2% | 12% | 14% |
| SurveyUSA | Aug 1–5 | 999 (LV) | ± 4.1% | 33% | 1% | 8% | 9% | 1% | 20% | 19% | 0% | 1% | 7% |
| Ipsos/Reuters | Aug 1–5 | 1,258 (A) | ± 3.0% | 22% | 3% | 4% | 6% | 2% | 18% | 9% | 2% | 13% | 21% |
| Quinnipiac University | Aug 1–5 | 807 (RV) | ± 4.1% | 32% | 2% | 5% | 7% | 2% | 14% | 21% | 1% | 3% | 10% |
| Change Research | Aug 2–4 | 1,450 | ± 3.0% | 23% | 2% | 9% | 7% | 2% | 23% | 26% | 2% | 4% | – |
| Public Policy Polling | Aug 1–4 | 588 | ± 4.0% | 36% | 4% | 4% | 10% | – | 12% | 13% | 2% | 4% | 14% |
| Morning Consult | Aug 1–4 | 9,845 (LV) | ± 1.0% | 33% | 3% | 6% | 9% | 3% | 19% | 15% | 2% | 10% | – |
| Pew Research Center* | Jul 22 – Aug 4 | 1,757 (RV) | ± 2.9% | 26% | 1% | 5% | 11% | 1% | 12% | 16% | 1% | 9% | 18% |
| HarrisX | Jul 31 – Aug 2 | 914 (RV) | ± 3.4% | 28% | 3% | 3% | 8% | 3% | 16% | 8% | 2% | 13% | 13% |
| Morning Consult | Aug 1 | 2,419 (LV) | ± 2.0% | 32% | 3% | 6% | 10% | 3% | 18% | 15% | 2% | 9% | – |
| Harvard CAPS/Harris | Jul 31 – Aug 1 | 585 | – | 34% | 2% | 4% | 9% | 3% | 17% | 8% | 1% | 5% | 14% |
| IBD/TIPP | Jul 25 – Aug 1 | 350 (RV) | – | 30% | 2% | 6% | 11% | 1% | 12% | 17% | 0% | 7% | 10% |

### July 2019

July 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Pete Buttigieg | Kamala Harris | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Other | Undecided |
| | Jul 31 | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate | Second night of the Second Democratic primary debate |
| Morning Consult | Jul 31 | 2,410 (LV) | ± 2.0% | 34% | 6% | 10% | 2% | 19% | 14% | 14% | – |
| | Jul 30 | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate | First night of the Second Democratic primary debate |
| YouGov/Economist | Jul 27–30 | 629 (LV) | – | 26% | 5% | 10% | 2% | 13% | 18% | 11% | 11% |
| Emerson College | Jul 27–29 | 520 | ± 4.2% | 33% | 6% | 11% | 4% | 20% | 14% | 11% | – |
| HarrisX | Jul 27–29 | 884 (RV) | – | 32% | 3% | 7% | 4% | 15% | 9% | 14% | 14% |
| The Hill/HarrisX | Jul 27–28 | 444 (RV) | ± 4.7% | 34% | 5% | 9% | 4% | 20% | 12% | 9% | 8% |
| Quinnipiac University | Jul 25–28 | 579 (RV) | ± 5.1% | 34% | 6% | 12% | 2% | 11% | 15% | 6% | 12% |
| McLaughlin & Associates | Jul 23–28 | 468 | – | 28% | 3% | 10% | 4% | 15% | 9% | 18% | 14% |
| Morning Consult | Jul 22–28 | 16,959 (LV) | ± 1.0% | 33% | 5% | 12% | 3% | 18% | 13% | 18% | – |
| Democracy Corps | Jul 18–28 | 471 | – | 31% | 8% | 12% | 2% | 22% | 15% | 10% | 3% |
| Echelon Insights | Jul 23–27 | 510 | ± 4.2% | 33% | 5% | 11% | 3% | 14% | 10% | 9% | 16% |
| Change Research | Jul 23–26 | 1,204 | ± 2.8% | 20% | 9% | 15% | 2% | 20% | 22% | 12% | – |
| USC Dornsife/Los Angeles Times | Jul 12–25 | 1,827 | ± 3.0% | 28% | 5% | 10% | 3% | 11% | 10% | 6% | 25% |
| Fox News | Jul 21–23 | 455 (LV) | ± 4.5% | 33% | 5% | 10% | 2% | 15% | 12% | 15% | 7% |
| YouGov/Economist | Jul 21–23 | 600 (LV) | – | 25% | 6% | 9% | 2% | 13% | 18% | 16% | 11% |
| Morning Consult | Jul 15–21 | 17,285 (LV) | ± 1.0% | 33% | 5% | 13% | 3% | 18% | 14% | 10% | – |
| HarrisX | Jul 15–17 | 910 (RV) | – | 26% | 4% | 10% | 4% | 14% | 9% | 11% | 18% |
| YouGov/Economist | Jul 14–16 | 572 (LV) | – | 23% | 7% | 10% | 2% | 13% | 15% | 13% | 14% |
| NBC News/SurveyMonkey | Jul 2–16 | 5,548 (RV) | ± 2.0% | 25% | 8% | 14% | 3% | 16% | 16% | 14% | 5% |
| Morning Consult | Jul 8–14 | 16,504 (LV) | ± 1.0% | 32% | 5% | 13% | 3% | 19% | 14% | 10% | – |
| TheHillHarrisX | Jul 12–13 | 446 (RV) | ± 3.1% | 29% | 1% | 11% | 3% | 16% | 9% | 13% | 17% |
| NBC News/Wall Street Journal | Jul 7–9 | 400 (LV) | ± 4.9% | 26% | 7% | 13% | 2% | 13% | 19% | 10% | 8% |
| YouGov/Economist | Jul 7–9 | 592 (LV) | – | 22% | 6% | 15% | 1% | 12% | 18% | 11% | 13% |
| Emerson College | Jul 6–8 | 481 | ± 4.4% | 30% | 5% | 15% | 4% | 15% | 15% | 16% | – |
| Swayable | Jul 5–7 | 1,921 (LV) | ± 2.0% | 28% | 6% | 16% | 4% | 18% | 12% | 7% | – |
| Morning Consult | Jul 1–7 | 16,599 (LV) | ± 1.0% | 31% | 6% | 14% | 3% | 19% | 13% | 15% | – |
| YouGov/Economist | Jun 30 – Jul 2 | 631 (LV) | – | 21% | 9% | 13% | 3% | 10% | 18% | 11% | 12% |
| Ipsos/Reuters | Jun 28 – Jul 2 | 1,367 | ± 3.0% | 22% | 3% | 10% | 3% | 16% | 9% | 9% | 21% |
| YouGov Blue/Data for Progress | Jun 27 – Jul 2 | 1,522 | – | 23% | 7% | 17% | 2% | 15% | 22% | 10% | – |
| HarrisX | Jun 29 – Jul 1 | 882 (RV) | ± 3.4% | 28% | 4% | 13% | 3% | 14% | 9% | 15% | 12% |
| ABC News/Washington Post | Jun 28 – Jul 1 | 460 (A) | ± 5.5% | 29% | 4% | 11% | 2% | 23% | 11% | 13% | 6% |
| Change Research | Jun 28 – Jul 1 | 1,185 | ± 2.9% | 18% | 10% | 21% | 2% | 17% | 22% | 8% | – |
| Quinnipiac University | Jun 28 – Jul 1 | 554 (RV) | ± 5.0% | 22% | 4% | 20% | 1% | 13% | 14% | 7% | 12% |

### April–June 2019

April–June 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Cory Booker | Pete Buttigieg | Kamala Harris | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Other | Undecided |
| CNN/SSRS | Jun 28–30 | 656 (RV) | ± 4.7% | 22% | 3% | 4% | 17% | 3% | 14% | 15% | 8% | 9% |
| HarrisX | Jun 28–30 | 909 (RV) | ± 3.4% | 28% | 2% | 4% | 11% | 3% | 14% | 8% | 10% | 15% |
| Morning Consult/FiveThirtyEight | Jun 27–30 | 2,485 (LV) | ± 2% | 31% | 2.5% | 5.9% | 16.8% | 2.1% | 16.8% | 14.4% | 6.7% | 3.9% |
| Harvard-Harris | Jun 26–29 | 845 | – | 34% | 3% | 3% | 9% | 2% | 15% | 11% | 10% | 9% |
| Morning Consult | Jun 27–28 | 2,407 (LV) | ± 2% | 33% | 3% | 6% | 12% | 2% | 19% | 12% | 13% | – |
| | Jun 27 | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate | Second night of the first Democratic primary debate |
| Morning Consult/FiveThirtyEight | Jun 26–27 | 2,041 (LV) | ± 2% | 33.7% | 3.6% | 4.8% | 6.6% | 3.1% | 17.8% | 17.7% | 9.6% | 3.3% |
| | Jun 26 | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate | First night of the first Democratic primary debate |
| YouGov Blue/Data for Progress | Jun 25–26 | 1,402 | – | 30% | 2% | 7% | 7% | 3% | 16% | 24% | 7% | – |
| HarrisX | Jun 24–26 | 892 (RV) | ± 3.4% | 29% | 1% | 3% | 6% | 4% | 17% | 9% | 12% | 15% |
| Morning Consult/FiveThirtyEight | Jun 19–26 | 7,150 (LV) | ± 1% | 38.5% | 2.8% | 6.9% | 7.9% | 3.9% | 16.3% | 12.7% | 5.3% | 5.5% |
| Echelon Insights | Jun 22–25 | 484 | – | 32% | 2% | 9% | 6% | 3% | 15% | 11% | 6% | 19% |
| YouGov/Economist | Jun 22–25 | 522 (LV) | – | 24% | 2% | 5% | 7% | 3% | 15% | 18% | 11% | 12% |
| Emerson College | Jun 21–24 | 457 | ± 4.5% | 34% | 3% | 6% | 7% | 1% | 27% | 14% | 8% | – |
| McLaughlin & Associates | Jun 18–24 | 459 | – | 34% | 2% | 6% | 6% | 4% | 17% | 11% | 11% | 12% |
| Morning Consult | Jun 17–23 | 16,188 (LV) | ± 1.0% | 38% | 3% | 7% | 6% | 4% | 19% | 13% | 15% | – |
| Change Research | Jun 19–21 | 1,071 | – | 24% | 2% | 13% | 8% | 2% | 22% | 22% | 5% | – |
| YouGov/Economist | Jun 16–18 | 576 (LV) | – | 26% | 2% | 9% | 7% | 4% | 13% | 14% | 9% | 15% |
| Monmouth University | Jun 12–17 | 306 | ± 5.6% | 32% | 2% | 5% | 8% | 3% | 14% | 15% | 7% | 11% |
| Morning Consult | Jun 10–16 | 17,226 (LV) | ± 1.0% | 38% | 3% | 7% | 7% | 4% | 19% | 11% | 12% | – |
| The Hill/HarrisX | Jun 14–15 | 424 (RV) | ± 4.8% | 35% | 3% | 4% | 5% | 6% | 13% | 7% | 10% | 17% |
| Suffolk University/USA Today | Jun 11–15 | 385 | ± 5.0% | 30% | 2% | 9% | 8% | 2% | 15% | 10% | 5% | 17% |
| WPA Intelligence (R) | Jun 10–13 | 1,000 | ± 3.1% | 35% | 3% | 8% | 9% | 4% | 14% | 10% | 3% | 13% |
| Fox News | Jun 9–12 | 449 (LV) | ± 4.5% | 32% | 3% | 8% | 8% | 4% | 13% | 9% | 9% | 10% |
| YouGov/Economist | Jun 9–11 | 513 (LV) | – | 26% | 2% | 8% | 6% | 3% | 12% | 16% | 8% | 14% |
| Quinnipiac University | Jun 6–10 | 503 | ± 5.4% | 30% | 1% | 8% | 7% | 3% | 19% | 15% | 5% | 13% |
| Change Research | Jun 5–10 | 1,621 | ± 2.6% | 26% | 1% | 14% | 8% | 3% | 21% | 19% | 7% | – |
| Morning Consult | Jun 3–9 | 17,012 (LV) | ± 1.0% | 37% | 3% | 7% | 7% | 4% | 19% | 11% | 14% | – |
| Ipsos/Reuters | May 29 – Jun 5 | 2,525 | – | 30% | 2% | 5% | 6% | 4% | 15% | 8% | 7% | 13% |
| YouGov/Economist | Jun 2–4 | 550 (LV) | – | 27% | 2% | 9% | 8% | 2% | 16% | 11% | 8% | 15% |
| Park Street Strategies | May 24 – Jun 4 | 600 (LV) | ± 4% | 32% | 1% | 7% | 12% | 1% | 15% | 13% | 19% | – |
| Swayable | Jun 1–3 | 977 (LV) | ± 3.0% | 40% | 4% | 6% | 8% | 3% | 20% | 7% | 7% | – |
| Avalanche Strategy | May 31 – Jun 3 | 1,109 | – | 29% | – | 13% | 12% | 4% | 17% | 16% | – | – |
| The Hill/HarrisX | Jun 1–2 | 431 (RV) | ± 4.7% | 35% | 3% | 8% | 4% | 4% | 16% | 5% | 5% | 17% |
| Morning Consult | May 27 – Jun 2 | 16,587 (LV) | ± 1.0% | 38% | 3% | 7% | 7% | 4% | 19% | 10% | 15% | – |
| CNN/SSRS | May 28–31 | 412 | ± 6.0% | 32% | 3% | 5% | 8% | 5% | 18% | 7% | 12% | 8% |
| Harvard-Harris | May 29–30 | 471 | – | 36% | 3% | 5% | 8% | 4% | 17% | 5% | 9% | 12% |
| Morning Consult | May 20–26 | 16,368 (LV) | ± 1.0% | 38% | 3% | 7% | 7% | 4% | 20% | 9% | 13% | – |
| HarrisX | May 23–25 | 881 (RV) | ± 3.4% | 33% | 3% | 5% | 6% | 3% | 15% | 7% | 8% | 14% |
| Echelon Insights | May 20–21 | 447 | – | 38% | 2% | 5% | 5% | 5% | 16% | 5% | 9% | 16% |
| Change Research | May 18–21 | 1,420 | ± 2.6% | 31% | 2% | 9% | 8% | 4% | 22% | 15% | 8% | – |
| Monmouth University | May 16–20 | 334 | ± 5.4% | 33% | 1% | 6% | 11% | 4% | 15% | 10% | 8% | 9% |
| Quinnipiac University | May 16–20 | 454 | ± 5.6% | 35% | 3% | 5% | 8% | 2% | 16% | 13% | 5% | 11% |
| Morning Consult | May 13–19 | 14,830 (LV) | ± 1.0% | 39% | 3% | 6% | 8% | 4% | 19% | 9% | 13% | – |
| The Hill/HarrisX | May 18–19 | 448 (RV) | ± 4.6% | 33% | 1% | 6% | 6% | 5% | 14% | 8% | 8% | 19% |
| Fox News | May 11–14 | 469 (LV) | ± 4.5% | 35% | 3% | 6% | 5% | 4% | 17% | 9% | 10% | 8% |
| Ipsos/Reuters | May 10–14 | 1,132 | ± 3.0% | 29% | 2% | 4% | 6% | 6% | 13% | 6% | 10% | 16% |
| Emerson College | May 10–13 | 429 | ± 4.7% | 33% | 1% | 8% | 10% | 3% | 25% | 10% | 12% | – |
| HarrisX | May 8–13 | 2,207 (RV) | ± 3.1% | 39% | 4% | 5% | 6% | 5% | 20% | 8% | 11% | – |
| Morning Consult | May 6–12 | 15,342 (LV) | ± 1.0% | 39% | 3% | 6% | 8% | 5% | 19% | 8% | 12% | – |
| McLaughlin & Associates | May 7–11 | 360 | – | 30% | 5% | 4% | 7% | 5% | 19% | 7% | 13% | 13% |
| Zogby Analytics | May 2–9 | 463 | – | 37% | 3% | 7% | 5% | 5% | 15% | 6% | 11% | 10% |
| GBAO | May 1–5 | 800 | ± 3.5% | 36% | 3% | 5% | 6% | 4% | 13% | 8% | 3% | 22% |
| Morning Consult | Apr 29 – May 5 | 15,770 (LV) | ± 1.0% | 40% | 3% | 6% | 7% | 5% | 19% | 8% | 12% | – |
| The Hill/HarrisX | May 3–4 | 440 (RV) | ± 5.0% | 46% | 3% | 8% | 6% | 3% | 14% | 7% | 14% | – |
| Harvard-Harris | Apr 30 – May 1 | 259 (RV) | – | 44% | 3% | 2% | 9% | 3% | 14% | 5% | 6% | 11% |
| Quinnipiac University | Apr 26–29 | 419 | ± 5.6% | 38% | 2% | 10% | 8% | 5% | 11% | 12% | 4% | 8% |
| HarrisX | Apr 26–28 | 741 (RV) | ± 3.7% | 33% | 3% | 5% | 5% | 5% | 16% | 6% | 10% | 13% |
| CNN/SSRS | Apr 25–28 | 411 | ± 5.9% | 39% | 2% | 7% | 5% | 6% | 15% | 8% | 10% | 7% |
| Morning Consult | Apr 22–28 | 15,475 (LV) | ± 1.0% | 36% | 3% | 8% | 7% | 5% | 22% | 9% | 14% | – |
| | Apr 25 | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy | Biden announces his candidacy |
| Ipsos/Reuters | Apr 17–23 | 2,237 | – | 24% | 3% | 7% | 6% | 6% | 15% | 5% | 13% | 21% |
| Morning Consult | Apr 15–21 | 14,335 (LV) | ± 1.0% | 30% | 4% | 9% | 8% | 6% | 24% | 7% | 12% | – |
| Echelon Insights | Apr 17–19 | 499 | – | 26% | 3% | 7% | 6% | 9% | 22% | 3% | 6% | 18% |
| Change Research | Apr 12–15 | 2,518 | ± 2.2% | 21% | 4% | 17% | 7% | 9% | 20% | 8% | 15% | – |
| Change Research | Apr 12–15 | 2,518 | ± 2.2% | – | 5% | 21% | 10% | 14% | 26% | 10% | 14% | – |
| Monmouth University | Apr 11–15 | 330 | ± 5.4% | 27% | 2% | 8% | 8% | 4% | 20% | 6% | 5% | 14% |
| Monmouth University | Apr 11–15 | 330 | ± 5.4% | – | 3% | 11% | 11% | 6% | 27% | 8% | 7% | 20% |
| USC Dornsife/LAT | Mar 15 – Apr 15 | 2,196 | ± 2.0% | 27% | 2% | 2% | 7% | 7% | 16% | 4% | 9% | 27% |
| | Apr 14 | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy | Buttigieg announces his candidacy |
| Emerson College | Apr 11–14 | 356 | ± 5.2% | 24% | 2% | 9% | 8% | 8% | 29% | 7% | 14% | – |
| Morning Consult | Apr 8–14 | 12,550 (LV) | ± 1.0% | 31% | 4% | 7% | 9% | 8% | 23% | 7% | 14% | – |
| Morning Consult | Apr 8–14 | 12,550 (LV) | ± 1.0% | – | 6% | 9% | 12% | 11% | 35% | 10% | 19% | – |
| Morning Consult | Apr 1–7 | 13,644 (LV) | ± 1.0% | 32% | 4% | 5% | 9% | 8% | 23% | 7% | 14% | – |
| The Hill/HarrisX | Apr 5–6 | 370 (RV) | ± 5.0% | 36% | 6% | 4% | 9% | 7% | 19% | 6% | 14% | – |

### March 2019

March 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Cory Booker | Pete Buttigieg | Kamala Harris | Amy Klobuchar | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Other | Undecided |
| HarrisX | Mar 29–31 | 743 (RV) | ± 3.7% | 29% | 4% | 3% | 6% | 2% | 6% | 18% | 5% | 6% | 16% |
| Morning Consult | Mar 25–31 | 12,940 (LV) | ± 1.0% | 33% | 4% | 2% | 8% | 3% | 8% | 25% | 7% | 10% | – |
| Harvard-Harris | Mar 25–26 | 263 | – | 35% | 4% | 2% | 5% | 2% | 7% | 17% | 6% | 9% | 13% |
| Quinnipiac University | Mar 21–25 | 559 | ± 5.1% | 29% | 2% | 4% | 8% | 2% | 12% | 19% | 4% | 2% | 14% |
| Morning Consult | Mar 18–24 | 13,725 (LV) | ± 1.0% | 35% | 4% | 2% | 8% | 2% | 8% | 25% | 7% | 10% | – |
| Fox News | Mar 17–20 | 403 | ± 5.0% | 31% | 4% | 1% | 8% | 1% | 8% | 23% | 4% | 8% | 11% |
| Emerson College | Mar 17–18 | 487 | ± 4.4% | 26% | 3% | 3% | 12% | 1% | 11% | 26% | 8% | 10% | – |
| CNN/SSRS | Mar 14–17 | 456 | ± 5.7% | 28% | 3% | 1% | 12% | 3% | 11% | 20% | 6% | 10% | 5% |
| Morning Consult | Mar 11–17 | 13,551 (LV) | ± 1.0% | 35% | 4% | 1% | 8% | 2% | 8% | 27% | 7% | 9% | – |
| | Mar 14 | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy | O'Rourke announces his candidacy |
| Change Research | Mar 8–10 | 1,919 | – | 36% | 3% | 2% | 9% | 2% | 7% | 24% | 9% | 8% | – |
| Change Research | Mar 8–10 | 1,919 | – | – | 5% | 1% | 17% | 3% | 14% | 36% | 13% | 9% | – |
| HarrisX | Mar 8–10 | 740 (RV) | ± 3.7% | 27% | 4% | 0% | 8% | 2% | 6% | 19% | 4% | 8% | 16% |
| Morning Consult | Mar 4–10 | 15,226 (LV) | ± 1.0% | 31% | 4% | 1% | 10% | 3% | 7% | 27% | 7% | 11% | – |
| | Mar 5 | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run | Bloomberg announces that he will not run |
| | Mar 4 | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run | Clinton announces that she will not run |
| Monmouth University | Mar 1–4 | 310 | ± 5.6% | 28% | 5% | <1% | 10% | 3% | 6% | 25% | 8% | 7% | 8% |
| Monmouth University | Mar 1–4 | 310 | ± 5.6% | – | 6% | <1% | 15% | 3% | 7% | 32% | 10% | 9% | 15% |
| GBAO | Feb 25 – Mar 3 | 817 | – | 28% | 3% | 0% | 9% | 2% | 7% | 20% | 5% | 4% | 22% |
| Morning Consult | Feb 25 – Mar 3 | 12,560 (LV) | ± 1.0% | 31% | 4% | 1% | 11% | 3% | 6% | 27% | 7% | 12% | – |

### January–February 2019

January–February 2019 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Cory Booker | Kamala Harris | Amy Klobuchar | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Other | Undecided |
| Morning Consult | Feb 18–24 | 15,642 (LV) | ± 1.0% | 29% | 2% | 4% | 10% | 3% | 7% | 27% | 7% | 13% | – |
| Harvard-Harris | Feb 19–20 | 337 | – | 37% | 3% | 2% | 10% | – | 6% | 22% | 4% | 5% | 10% |
| | Feb 19 | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy | Sanders announces his candidacy |
| Morning Consult | Feb 11–17 | 15,383 (LV) | ± 1.0% | 30% | 2% | 5% | 11% | 4% | 7% | 21% | 8% | 11% | – |
| Emerson College | Feb 14–16 | 431 | ± 4.7% | 27% | 2% | 9% | 15% | 5% | 4% | 17% | 9% | 12% | – |
| Bold Blue Campaigns | Feb 9–11 | 500 | ± 4.5% | 12% | <1% | <1% | 11% | 1% | 7% | 9% | 3% | 9% | 48% |
| | Feb 10 | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy | Klobuchar announces her candidacy |
| Morning Consult | Feb 4–10 | 11,627 (LV) | ± 1.0% | 29% | 2% | 5% | 13% | 3% | 7% | 22% | 8% | 11% | – |
| | Feb 9 | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy | Warren announces her candidacy |
| Morning Consult | Jan 28 – Feb 3 | 14,494 (LV) | ± 1.0% | 30% | 2% | 4% | 14% | 2% | 6% | 21% | 9% | 9% | – |
| Morning Consult/Politico | Feb 1–2 | 737 (RV) | ± 4.0% | 29% | 2% | 5% | 14% | 2% | 5% | 16% | 6% | 7% | 13% |
| | Feb 1 | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy | Booker announces his candidacy |
| Monmouth University | Jan 25–27 | 313 | ± 5.5% | 29% | 4% | 4% | 11% | 2% | 7% | 16% | 8% | 8% | 9% |
| Morning Consult/Politico | Jan 25–27 | 685 (RV) | ± 4.0% | 33% | 2% | 3% | 10% | 1% | 6% | 15% | 6% | 10% | 15% |
| Morning Consult | Jan 21–27 | 14,381 (LV) | ± 1.0% | 31% | 3% | 3% | 11% | 2% | 7% | 21% | 9% | 9% | – |
| Morning Consult/Politico | Jan 18–22 | 694 (RV) | ± 4.0% | 26% | 2% | 4% | 9% | 2% | 6% | 16% | 6% | 11% | 18% |
| | Jan 21 | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy | Harris announces her candidacy |
| Emerson College | Jan 20–21 | 355 | ± 5.2% | 45% | 7% | 8% | 3% | 1% | 3% | 5% | 3% | 25% | – |
| Emerson College | Jan 20–21 | 355 | ± 5.2% | – | – | – | 19% | – | – | – | 43% | 38% | – |
| Zogby Analytics | Jan 18–20 | 410 | ± 4.8% | 27% | 8% | 1% | 6% | – | 6% | 18% | 9% | 5% | 21% |
| Morning Consult | Jan 14–20 | 14,250 (LV) | ± 1.0% | 30% | 4% | 3% | 6% | 2% | 8% | 23% | 11% | 9% | – |
| Harvard-Harris | Jan 15–16 | 479 | – | 23% | 5% | 3% | 7% | – | 8% | 21% | 4% | 8% | 15% |
| Morning Consult/Politico | Jan 11–14 | 674 (RV) | ± 4.0% | 32% | 1% | 2% | 6% | 1% | 8% | 15% | 9% | 9% | 18% |
| Morning Consult | Jan 7–13 | 4,749 (LV) | ± 2.0% | 31% | 4% | 3% | 7% | 2% | 8% | 23% | 11% | 8% | – |

## Before 2019
### October–December 2018

October–December 2018 polling :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Cory Booker | Kamala Harris | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Other | Undecided |
| CNN/SSRS | Dec 6–9 | 463 | ± 5.6% | 30% | 3% | 5% | 4% | 9% | 14% | 3% | 15% | 9% |
| Emerson College | Dec 6–9 | 320 | – | 26% | – | – | 9% | 15% | 22% | 7% | 22% | – |
| Harvard-Harris | Nov 27–28 | 449 | – | 28% | 4% | 4% | 3% | 7% | 21% | 5% | 4% | 18% |
| Morning Consult/Politico | Nov 7–9 | 733 (RV) | ± 4.0% | 26% | 2% | 3% | 4% | 8% | 19% | 5% | 12% | 21% |
| CNN/SSRS | Oct 4–7 | 464 | ± 5.5% | 33% | 4% | 5% | 9% | 4% | 13% | 8% | 16% | 6% |

### Before October 2018

Polling prior to December 2018 :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Cory Booker | Andrew Cuomo | Kirsten Gillibrand | Kamala Harris | Bernie Sanders | Elizabeth Warren | Oprah Winfrey | Other | Undecided |
| | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 | 2018 |
| Zogby Analytics | Aug 6–8 | 576 | ± 4.1% | 27% | 4% | 3% | 2% | 5% | 16% | 7% | – | 7% | 31% |
| GQR Research | Jul 19–26 | 443 | – | 30% | 8% | – | – | 5% | 28% | 13% | – | 8% | 9% |
| Zogby Analytics | Jun 4–6 | 495 | ± 4.4% | 21% | 4% | 4% | 1% | 5% | 19% | 6% | 10% | 2% | 29% |
| Saint Leo University | May 25–31 | – | – | 19% | 2% | 4% | 2% | 4% | 9% | 4% | 15% | 15% | 21% |
| Zogby Analytics | May 10–12 | 533 | ± 4.2% | 26% | 3% | 2% | 1% | 4% | 18% | 8% | 14% | 5% | 22% |
| Civis Analytics | Jan 2018 | – | – | 29% | – | – | – | – | 27% | – | 17% | – | – |
| RABA Research | Jan 10–11 | 345 | ± 5.0% | 26% | – | – | – | – | 21% | 18% | 20% | – | 15% |
| SurveyMonkey/Axios | Jan 10–11 | – | – | 22% | 3% | – | 4% | 7% | 17% | 16% | 16% | 9% | – |
| Emerson College | Jan 8–11 | 216 | – | 27% | 3% | – | 3% | 2% | 23% | 9% | – | 15% | 19% |
| GQR Research | Jan 6–11 | 442 | – | 26% | 6% | – | – | – | 29% | 14% | 8% | 12% | 6% |
| | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 | 2017 |
| Zogby Analytics | Sep 7–9 | 356 | ± 5.2% | 17% | – | 3% | 3% | 6% | 28% | 12% | – | 9% | 23% |
| Gravis Marketing | Jul 21–31 | 1,917 | – | 21% | 4% | 1% | 2% | 6% | – | – | – | 8% | 43% |
| | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 | 2016 |
| Public Policy Polling | Dec 6–7 | 400 | ± 4.9% | 31% | 4% | 2% | 3% | – | 24% | 16% | – | 7% | 14% |

## Polls including Hillary Clinton and Michelle Obama

Polls including Clinton and Obama :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Cory Booker | Hillary Clinton | Kamala Harris | Michelle Obama | Beto O'Rourke | Bernie Sanders | Elizabeth Warren | Oprah Winfrey | Other | Undecided |
| McLaughlin & Associates | Dec 14–18, 2019 | 480 (LV) | – | 23% | 5% | 4% | 6% | – | – | – | 17% | 15% | – | 22% | 10% |
| Zogby Analytics | Dec 5–8, 2019 | 443 (LV) | ± 4.7% | 28% | 9% | – | 6% | – | – | – | 20% | 12% | – | 21% | 5% |
| Harvard-Harris | Nov 27–29, 2019 | 756 (RV) | – | 20% | 5% | 1% | 22% | 2% | – | 1% | 12% | 9% | – | 22% | 7% |
| Harvard-Harris | Oct 29–31, 2019 | 640 (RV) | – | 19% | 6% | 3% | 18% | 3% | – | 2% | 12% | 13% | – | 17% | 7% |
| Fox News | Oct 27–30, 2019 | 471 (LV) | ± 4.5% | – | – | – | 27% | – | – | – | – | – | – | 30% | 43% |
| Fox News | Oct 27–30, 2019 | 471 (LV) | ± 4.5% | – | – | – | – | – | 50% | – | – | – | – | 8% | 42% |
| McLaughlin & Associates | Oct 17–22, 2019 | 468 (LV) | – | – | 1% | 4% | 10% | 9% | – | 3% | 23% | 20% | – | 21% | 10% |
| Harvard-Harris | Apr 30 – May 1, 2019 | 254 (RV) | – | 34% | 2% | 5% | 6% | 4% | – | 8% | 17% | 3% | – | 12% | 9% |
| ABC News/Washington Post* | Apr 22–25, 2019 | 427 (A) | ± 5.5% | 17% | <1% | 1% | 2% | 4% | 2% | 4% | 11% | 4% | – | 14% | 35% |
| Harvard-Harris | Mar 25–26, 2019 | 273 | – | 26% | 0% | 3% | 11% | 11% | – | 5% | 18% | 5% | – | 6% | 12% |
| McLaughlin & Associates | Mar 20–24, 2019 | 447 | – | 28% | – | 3% | 8% | 8% | – | 8% | 17% | 5% | – | 8% | 16% |
| D-CYFOR | Feb 22–23, 2019 | 453 | – | 39% | 2% | 4% | 8% | 8% | – | 3% | 14% | 5% | – | 5% | 11% |
| Harvard-Harris | Feb 19–20, 2019 | 346 | – | 30% | 2% | 5% | 10% | 10% | – | 4% | 19% | 4% | – | 1% | 13% |
| The Hill/HarrisX | Feb 17–18, 2019 | 370 (RV) | ± 5.0% | 25% | 5% | 4% | – | 12% | 25% | 6% | 11% | 5% | – | 7% | – |
| McLaughlin & Associates | Feb 6–10, 2019 | 450 | – | 25% | 2% | 3% | 7% | 8% | – | 6% | 16% | 5% | 5% | 10% | 15% |
| ABC News/Washington Post* | Jan 21–24, 2019 | 447 | ± 5.5% | 9% | <1% | 1% | 1% | 8% | 2% | 3% | 4% | 2% | 1% | 11% | 43% |
| Zogby Analytics | Jan 18–20, 2019 | 410 | ± 4.8% | 25% | 5% | 3% | – | 5% | 17% | 4% | 12% | 5% | – | 5% | 20% |
| Harvard-Harris | Jan 15–16, 2019 | 488 | – | 24% | 5% | 2% | 10% | 4% | – | 9% | 13% | 5% | – | 6% | 17% |
| Morning Consult/Politico | Jan 4–6, 2019 | 699 (RV) | ± 4.0% | 27% | 1% | 3% | 12% | 3% | – | 7% | 16% | 4% | – | 9% | 15% |
| Change Research | Dec 13–17, 2018 | 2,968 | – | 21% | 2% | 4% | 5% | 8% | – | 21% | 16% | 7% | – | 18% | – |
| Morning Consult/Politico | Dec 14–16, 2018 | 706 (RV) | ± 4.0% | 25% | 2% | 3% | 13% | 3% | – | 8% | 15% | 3% | – | 13% | 15% |
| McLaughlin & Associates | Dec 10–14, 2018 | 468 | – | 17% | 2% | – | 9% | 3% | 16% | 11% | 18% | 4% | 3% | 7% | 11% |
| Harvard-Harris | Nov 27–28, 2018 | 459 | – | 25% | 2% | 3% | 13% | 2% | – | 9% | 15% | 4% | – | 5% | 15% |
| The Hill/HarrisX | Nov 5–6, 2018 | 370 (RV) | ± 5.0% | 30% | 5% | 5% | 16% | 5% | – | – | 20% | 5% | – | – | 14% |
| Change Research | Oct 24–26, 2018 | – | – | 23% | – | 5% | 6% | 10% | – | 10% | 18% | 9% | – | 8% | – |
| Harvard-Harris | Jun 24–25, 2018 | 533 | – | 32% | 3% | 6% | 18% | 2% | – | – | 16% | 10% | – | 14% | – |
| Harvard-Harris | Jan 13–16, 2018 | 711 | – | 27% | – | 4% | 13% | 4% | – | – | 16% | 10% | 13% | 13% | – |
| USC Dornsife/LAT | Dec 15, 2017 – Jan 15, 2018 | 1,576 | ± 3.0% | 28% | – | 3% | 19% | 5% | – | – | 22% | 11% | – | 7% | – |
| Zogby Analytics | Oct 19–25, 2017 | 682 | ± 3.8% | 19% | – | – | – | 3% | 22% | – | 18% | 8% | – | 10% | 20% |

## Head-to-head polls

Head-to-head polling data taken while more than two major candidates were in the race :
| Poll source | Date(s) administered | Sample size | Margin of error | Joe Biden | Michael Bloomberg | Pete Buttigieg | Kirsten Gillibrand | Kamala Harris | Amy Klobuchar | Bernie Sanders | Elizabeth Warren | Oprah Winfrey | Undecided |
| Ipsos/Reuters | Mar 13-16, 2020 | 458 (RV) | ± 5.2% | 54% | – | – | – | – | – | 46% | – | – | – |
| Ipsos/Reutuers | Mar 6-9, 2020 | 420 (RV) | ± 5.5% | 59% | – | – | – | – | – | 41% | – | – | – |
| Ipsos/Reuters | Mar 4-5, 2020 | 474 (RV) | ± 5.1% | 55% | – | – | – | – | – | 45% | – | – | – |
| Ipsos/Reuters | Feb 28-Mar 2, 2020 | 469 (RV) | ± 5.2% | 48% | – | – | – | – | – | 52% | – | – | – |
| Ipsos/Reuters | Feb 28-Mar 2, 2020 | 469 (RV) | ± 5.2% | – | 41% | – | – | – | – | 59% | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | 78.6% | 21.4% | – | – | – | – | – | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | 45.4% | – | 54.6% | – | – | – | – | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | 51.1% | – | – | – | – | 48.9% | – | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | 35.7% | – | – | – | – | – | 64.3% | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | 32.4% | – | – | – | – | – | – | 67.6% | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | 77.1% | 22.9% | – | – | – | – | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | 27.4% | – | – | – | 72.6% | – | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | 24.9% | – | – | – | – | 75.1% | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | 22.7% | – | – | – | – | – | 77.3% | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | – | 57.5% | – | – | 42.5% | – | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | – | 37.2% | – | – | – | 62.8% | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | – | 31.9% | – | – | – | – | 68.1% | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | – | – | – | – | 31.9% | 68.1% | – | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | – | – | – | – | 22.6% | – | 77.4% | – | – |
| Change Research/Election Science | Feb 25–27, 2020 | 821 (LV) | – | – | – | – | – | – | – | 54.2% | 45.8% | – | – |
| NBC News/Wall Street Journal | Feb 14-17, 2020 | 426 (LV) | ± 4.8% | – | 38% | – | – | – | – | 59% | – | – | 3% |
| NBC News/Wall Street Journal | Feb 14-17, 2020 | 426 (LV) | ± 4.8% | – | – | 40% | – | – | – | 57% | – | – | 5% |
| Zogby Analytics | Feb 13–14, 2020 | 732 (LV) | ± 3.6% | – | 50% | – | – | – | – | 50% | – | – | – |
| YouGov/Yahoo News | Feb 12–13, 2020 | 367 (LV) | – | 47% | 34% | – | – | – | – | – | – | – | 19% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 347 (LV) | – | 45% | – | 42% | – | – | – | – | – | – | 13% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 362 (LV) | – | 43% | – | – | – | – | 45% | – | – | – | 12% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 359 (LV) | – | 44% | – | – | – | – | – | 48% | – | – | 8% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 366 (LV) | – | 41% | – | – | – | – | – | – | 49% | – | 9% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 331 (LV) | – | – | 37% | 44% | – | – | – | – | – | – | 19% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 351 (LV) | – | – | 38% | – | – | – | 43% | – | – | – | 20% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 369 (LV) | – | – | 38% | – | – | – | – | 53% | – | – | 10% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 375 (LV) | – | – | 38% | – | – | – | – | – | 52% | – | 10% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 388 (LV) | – | – | – | 33% | – | – | 44% | – | – | – | 23% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 347 (LV) | – | – | – | 37% | – | – | – | 54% | – | – | 10% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 347 (LV) | – | – | – | 34% | – | – | – | – | 52% | – | 14% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 383 (LV) | – | – | – | – | – | – | 33% | 54% | – | – | 13% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 344 (LV) | – | – | – | – | – | – | 31% | – | 50% | – | 19% |
| YouGov/Yahoo News | Feb 12–13, 2020 | 348 (LV) | – | – | – | – | – | – | – | 44% | 42% | – | 14% |
| YouGov Blue/Data for Progress | Jan 18–26, 2020 | 1,619 (LV) | ± 2.6% | 53% | – | – | – | – | – | 41% | – | – | – |
| YouGov Blue/Data for Progress | Jan 18–26, 2020 | 1,619 (LV) | ± 2.6% | 47% | – | – | – | – | – | – | 45% | – | – |
| Echelon Insights | Jan 20–23, 2020 | 474 (LV) | – | 56% | – | 32% | – | – | – | – | – | – | 12% |
| Echelon Insights | Jan 20–23, 2020 | 474 (LV) | – | 54% | – | – | – | – | – | 38% | – | – | 8% |
| Echelon Insights | Jan 20–23, 2020 | 474 (LV) | – | 48% | – | – | – | – | – | – | 43% | – | 9% |
| Echelon Insights | Dec 9–14, 2019 | 447 (LV) | – | 65% | – | 20% | – | – | – | – | – | – | 16% |
| Echelon Insights | Dec 9–14, 2019 | 447 (LV) | – | 58% | – | – | – | – | – | 32% | – | – | 11% |
| Echelon Insights | Dec 9–14, 2019 | 447 (LV) | – | 59% | – | – | – | – | – | – | 29% | – | 11% |
| Swayable | Nov 16–18, 2019 | 2,077 (LV) | ± 2% | 44.8% | – | – | – | – | – | – | 34.2% | – | 21% |
| Swayable | Oct 26–27, 2019 | 2,172 (LV) | ± 2% | 45.2% | – | – | – | – | – | – | 34.7% | – | 20.1% |
| Echelon Insights | Oct 21–25, 2019 | 449 (LV) | – | 62% | – | – | – | 25% | – | – | – | – | 13% |
| Echelon Insights | Oct 21–25, 2019 | 449 (LV) | – | 60% | – | – | – | – | – | 28% | – | – | 11% |
| Echelon Insights | Oct 21–25, 2019 | 449 (LV) | – | 49% | – | – | – | – | – | – | 34% | – | 17% |
| Swayable | Oct 7–8, 2019 | 2,077 (LV) | ± 2% | 48.1% | – | – | – | – | – | – | 36.2% | – | 15.7% |
| HarrisX | Oct 4–6, 2019 | 803 (LV) | – | 41% | – | – | – | 41% | – | – | – | – | 18% |
| HarrisX | Oct 4–6, 2019 | 803 (LV) | – | 41% | – | – | – | – | – | 40% | – | – | 19% |
| HarrisX | Oct 4–6, 2019 | 803 (LV) | – | 42% | – | – | – | – | – | – | 39% | – | 20% |
| HarrisX | Oct 4–6, 2019 | 803 (LV) | – | – | – | – | – | 38% | – | 42% | – | – | 19% |
| HarrisX | Oct 4–6, 2019 | 803 (LV) | – | – | – | – | – | 40% | – | – | 36% | – | 24% |
| HarrisX | Oct 4–6, 2019 | 803 (LV) | – | – | – | – | – | – | – | 42% | 40% | – | 18% |
| Swayable | Sep 25–26, 2019 | 3,491 (LV) | ± 2% | 47.7% | – | – | – | – | – | – | 34.2% | – | 18.1% |
| Morning Consult | Sep 20–22, 2019 | 635 (LV) | – | 52% | – | – | – | – | – | 37% | – | – | 12% |
| Morning Consult | Sep 20–22, 2019 | 635 (LV) | – | 45% | – | – | – | – | – | – | 38% | – | 17% |
| Morning Consult | Sep 20–22, 2019 | 635 (LV) | – | – | – | – | – | – | – | 38% | 49% | – | 13% |
| Swayable | Sep 16–18, 2019 | 3,140 (LV) | ± 2% | 49.8% | – | – | – | – | – | 31% | – | – | 19.2% |
| Fox News | Sep 15–17, 2019 | 480(LV) | ± 4.5% | 53% | – | – | – | – | – | – | 37% | – | 7% |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | 51% | – | – | – | – | – | 40% | – | – | 7% |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | 43% | – | – | – | – | – | – | 49% | – | 6% |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | – | – | – | – | 36% | 55% | – | 7% |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | 63.5% | – | 36.5% | – | – | – | – | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | 60.4% | – | – | – | 39.6% | – | – | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | 86.4% | – | – | – | – | 16.4% | – | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | 44.6% | – | 55.4% | – | – | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | 72.8% | – | – | 27.2% | – | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | 34.6% | – | – | – | 65.4% | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | 20.7% | – | – | – | – | 79.3% | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | – | – | 79.6% | 20.4% | – | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | – | – | 42.3% | – | 57.7% | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | – | – | 24.6% | – | – | 75.4% | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | – | – | – | 22.8% | 77.2% | – | – | – |
| YouGov/FairVote | Sep 2–6, 2019 | 1002(LV) | ± 3.3% | – | – | – | – | – | 9.9% | – | 90.1% | – | – |
| Swayable | Aug 22–23, 2019 | 1,849 (LV) | ± 2% | 46.8% | – | – | – | – | – | 30.5% | – | – | 22.7% |
| Echelon Insights | Aug 19–21, 2019 | 479 (RV) | – | 55% | – | – | – | 31% | – | – | – | – | 14% |
| Echelon Insights | Aug 19–21, 2019 | 479 (RV) | – | 55% | – | – | – | – | – | 35% | – | – | 10% |
| Echelon Insights | Aug 19–21, 2019 | 479 (RV) | – | 52% | – | – | – | – | – | – | 32% | – | 16% |
| HarrisX | Aug 16–18, 2019 | 909 (RV) | – | 42% | – | – | – | 38% | – | – | – | – | 19% |
| HarrisX | Aug 16–18, 2019 | 909 (RV) | – | 44% | – | – | – | – | – | 38% | – | – | 18% |
| HarrisX | Aug 16–18, 2019 | 909 (RV) | – | 39% | – | – | – | – | – | – | 41% | – | 20% |
| HarrisX | Aug 16–18, 2019 | 909 (RV) | – | – | – | – | – | 35% | – | 42% | – | – | 23% |
| HarrisX | Aug 16–18, 2019 | 909 (RV) | – | – | – | – | – | 38% | – | – | 33% | – | 30% |
| HarrisX | Aug 16–18, 2019 | 909 (RV) | – | – | – | – | – | – | – | 43% | 37% | – | 21% |
| Swayable | Aug 5–6, 2019 | 1,958 (LV) | ± 2% | 46.5% | – | – | – | – | – | 30.6% | – | – | 22.9% |
| Echelon Insights | Jul 23–27, 2019 | 510 (RV) | – | 56% | – | – | – | 33% | – | – | – | – | 11% |
| Echelon Insights | Jul 23–27, 2019 | 510 (RV) | – | 58% | – | – | – | – | – | 29% | – | – | 12% |
| Echelon Insights | Jul 23–27, 2019 | 510 (RV) | – | 54% | – | – | – | – | – | – | 35% | – | 10% |
| Swayable | Jul 5–7, 2019 | 1,921 (LV) | ± 2% | 43% | – | – | – | – | – | 32% | – | – | 25% |
| HarrisX | Jun 28–30, 2019 | 909 (RV) | ± 3.4% | 40% | – | – | – | 41% | – | – | – | – | 20% |
| HarrisX | Jun 28–30, 2019 | 909 (RV) | ± 3.4% | 41% | – | – | – | – | – | 40% | – | – | 19% |
| HarrisX | Jun 28–30, 2019 | 909 (RV) | ± 3.4% | 41% | – | – | – | – | – | – | 40% | – | 19% |
| HarrisX | Jun 28–30, 2019 | 909 (RV) | ± 3.4% | – | – | – | – | 39% | – | 41% | – | – | 20% |
| HarrisX | Jun 28–30, 2019 | 909 (RV) | ± 3.4% | – | – | – | – | 34% | – | – | 35% | – | 31% |
| HarrisX | Jun 28–30, 2019 | 909 (RV) | ± 3.4% | – | – | – | – | – | – | 41% | 36% | – | 23% |
| Echelon Insights | Jun 22–25, 2019 | 484 | – | 57% | – | – | – | – | – | 27% | – | – | 16% |
| Echelon Insights | Jun 22–25, 2019 | 484 | – | 56% | – | – | – | – | – | – | 26% | – | 18% |
| Swayable | Jun 1–3, 2019 | 977 (LV) | ± 3% | 53.4% | – | – | – | – | – | 28.6% | – | – | 18% |
| HarrisX | May 28–30, 2019 | 881 (RV) | ± 3.4% | 41% | – | – | – | 38% | – | – | – | – | 20% |
| HarrisX | May 28–30, 2019 | 881 (RV) | ± 3.4% | 43% | – | – | – | – | – | 41% | – | – | 16% |
| HarrisX | May 28–30, 2019 | 881 (RV) | ± 3.4% | 39% | – | – | – | – | – | – | 41% | – | 20% |
| HarrisX | May 28–30, 2019 | 881 (RV) | ± 3.4% | – | – | – | – | 37% | – | 42% | – | – | 21% |
| HarrisX | May 28–30, 2019 | 881 (RV) | ± 3.4% | – | – | – | – | – | – | 37% | 40% | – | 23% |
| Echelon Insights | May 20–21, 2019 | 447 | – | 65% | – | 17% | – | – | – | – | – | – | 19% |
| Echelon Insights | May 20–21, 2019 | 447 | – | 63% | – | – | – | 20% | – | – | – | – | 17% |
| Echelon Insights | May 20–21, 2019 | 447 | – | 61% | – | – | – | – | – | 25% | – | – | 14% |
| Echelon Insights | May 20–21, 2019 | 447 | – | 66% | – | – | – | – | – | – | 19% | – | 15% |
| Morning Consult/Politico | Jan 11–16, 2018 | 689 (RV) | ± 4.0% | 54% | – | – | – | – | – | – | – | 31% | 15% |
| Morning Consult/Politico | Jan 11–16, 2018 | 689 (RV) | ± 4.0% | – | – | – | 23% | – | – | – | – | 44% | 34% |
| Morning Consult/Politico | Jan 11–16, 2018 | 689 (RV) | ± 4.0% | – | – | – | – | – | – | 46% | – | 37% | 17% |
| Morning Consult/Politico | Jan 11–16, 2018 | 689 (RV) | ± 4.0% | – | – | – | – | – | – | – | 35% | 39% | 26% |

## Favorability ratings

Unlike traditional preference polling, favorability ratings allow individuals to independently rate each candidate. This provides a comprehensive impression of a candidate's electorate appeal without vote splitting distortion, where votes divide between ideologically similar candidates in multi-candidate polls. Favorability indicates general candidate acceptance among voters, irrespective of final vote choice. The table uses net favorability (favorable minus unfavorable).

### From February 2020 to April 2020

Favorability ratings from February 2020 to April 2020 :
| Poll source | Date(s) administered | Biden | Sanders | Gabbard | Warren | Bloomberg | Klobuchar | Buttigieg | Steyer | Patrick | Bennet | Yang |
| YouGov/Economist | Apr 26–28, 2020 | 51% | | | | | | | | | | |
| Emerson College | Apr 26–28, 2020 | 61.1% | | | | | | | | | | |
| YouGov/Economist | Apr 19–21, 2020 | 54% | | | | | | | | | | |
| Morning Consult/Politico | Apr 18–19, 2020 | 66% | | | | | | | | | | |
| Morning Consult | Apr 13–19, 2020 | 60% | | | | | | | | | | |
| YouGov/Economist | Apr 12–14, 2020 | 54% | | | | | | | | | | |
| Morning Consult | Apr 6–12, 2020 | 57% | | | | | | | | | | |
| YouGov/Economist | Apr 5–7, 2020 | 58% | 52% | | | | | | | | | |
| Fox News | Apr 4–7, 2020 | 61% | | | | | | | | | | |
| Monmouth | Apr 3–7, 2020 | 57% | 45% | | | | | | | | | |
| Quinnipiac | Apr 2–6, 2020 | 66% | | | | | | | | | | |
| Morning Consult | Mar 31 - Apr 5, 2020 | 56% | 51% | | | | | | | | | |
| YouGov/Economist | Mar 29–31, 2020 | 43% | 52% | | | | | | | | | |
| Selzer & Co./Grinnell College | Mar 27–30, 2020 | 59% | 49% | | | | | | | | | |
| Morning Consult | Mar 23–29, 2020 | 56% | 49% | | | | | | | | | |
| YouGov/Economist | Mar 22–24, 2020 | 47% | 39% | | | | | | | | | |
| Monmouth | Mar 18–22, 2020 | 69% | | | | | | | | | | |
| Morning Consult | Mar 16–22, 2020 | 56% | 50% | | | | | | | | | |
| YouGov/Economist | Mar 15–17, 2020 | 50% | 50% | −14% | | | | | | | | |
| Ipsos/Reutuers | Mar 13–16, 2020 | 62% | 58% | | | | | | | | | |
| Morning Consult | Mar 11–15, 2020 | 57% | 52% | −6% | | | | | | | | |
| NBC/WSJ | Mar 11–13, 2020 | 55% | 51% | | | | | | | | | |
| YouGov/Hofstra University | Mar 5–12, 2020 | 74.1% | 53.4% | | 71.6% | | | | | | | |
| YouGov/Economist | Mar 8–10, 2020 | 47% | 40% | | | | | | | | | |
| Ipsos/Reuters | Mar 6–9, 2020 | 70% | 59% | | | | | | | | | |
| Morning Consult | Mar 5–8, 2020 | 55% | 46% | −10% | | | | | | | | |
| Quinnipiac | Mar 5–8, 2020 | 64% | 54% | | | | | | | | | |
| CNN/SSRS | Mar 4–7, 2020 | 51% | 40% | | 39% | −11% | | | | | | |
| YouGov/Economist | Mar 1–3, 2020 | 41% | 36% | −23% | 50% | −7% | 36% | 36% | | | | |
| YouGov/Yahoo News | Feb 26–27, 2020 | 57% | 57% | | 60% | 15% | 48% | 44% | | | | |
| Change Research/Election Science | Feb 25–27, 2020 | 36% | 60% | 7% | 55% | 20% | 28% | 39% | 13% | | | |
| Morning Consult | Feb 23–27, 2020 | 40% | 52% | −8% | 35% | 17% | 26% | 35% | 16% | | | |
| Fox News | Feb 23–26, 2020 | 47% | 48% | | 38% | 22% | 27% | 35% | 17% | | | |
| YouGov/Economist | Feb 23–25, 2020 | 37% | 51% | −26% | 52% | −12% | 36% | 26% | 19% | | | |
| Morning Consult | Feb 20, 2020 | | | | | 17% | | | | | | |
| YouGov/Economist | Feb 16–18, 2020 | 39% | 46% | −28% | 53% | 15% | 41% | 43% | 26% | | | |
| Morning Consult | Feb 12–17, 2020 | 39% | 53% | −7% | 36% | 36% | 32% | 41% | 18% | | | |
| YouGov/Economist | Feb 9–11, 2020 | 34% | 48% | −20% | 51% | 28% | 35% | 39% | 33% | 11% | 17% | 51% |
| Ipsos/Reuters | Feb 6–10, 2020 | 56% | 65% | | 56% | 53% | 36% | 49% | 26% | | | |
| Monmouth | Feb 6–9, 2020 | 38% | 53% | | 48% | 14% | 31% | 36% | | | | |
| Quinnipiac | Feb 5–9, 2020 | 54% | 58% | | 60% | 40% | 49% | 47% | 20% | | | 32% |
| Morning Consult | Feb 4–9, 2020 | 43% | 53% | −6% | 41% | 40% | 28% | 42% | 21% | 4% | 8% | 35% |
| Ipsos/FiveThirtyEight | Feb 7–8, 2020 | 33.9% | 42.8% | | 37.1% | | 23.1% | 35.8% | 12.9% | | | 20.7% |
| Ipsos/FiveThirtyEight | Feb 4–6, 2020 | 39.5% | 41.5% | | 38.3% | | 19.6% | 33.8% | 11.4% | | | 21.6% |
| YouGov/Economist | Feb 2–4, 2020 | 40% | 38% | −27% | 49% | 26% | 32% | 40% | 29% | 11% | 19% | 46% |
| Morning Consult | Jan 27 – Feb 2, 2020 | 47% | 53% | −7% | 44% | 37% | 23% | 33% | 23% | 5% | 8% | 35% |

### From October 2019 to January 2020

Favorability ratings from October 2019 to January 2020 :
| Poll source | Date(s) administered | Biden | Sanders | Gabbard | Warren | Bloomberg | Klobuchar | Buttigieg | Steyer | Patrick | Bennet | Yang | Delaney | Booker | Williamson | Castro | Harris | Bullock | Sestak | Messam | O'Rourke | Ryan |
| YouGov/Economist | Jan 26–28, 2020 | 40% | 45% | −30% | 58% | 12% | 33% | 38% | 19% | 8% | 11% | 47% | 1% | | | | | | | | | |
| Morning Consult | Jan 20–26, 2020 | 52% | 52% | −5% | 43% | 33% | 25% | 35% | 22% | 4% | 11% | 36% | 5% | | | | | | | | | |
| Echelon Insights | Jan 20–23, 2020 | 51% | 52% | | 50% | 44% | | 47% | | | | | | | | | | | | | | |
| YouGov/Economist | Jan 19–21, 2020 | 50% | 50% | −19% | 57% | 22% | 36% | 37% | 30% | 4% | 15% | 47% | −1% | | | | | | | | | |
| Monmouth | Jan 16–20, 2020 | 52% | 48% | | 42% | 17% | 32% | 27% | 6% | | | 35% | | | | | | | | | | |
| Morning Consult | Jan 15–19, 2020 | 51% | 53% | −6% | 44% | 32% | 24% | 34% | 24% | 5% | 10% | 36% | 4% | | | | | | | | | |
| Ipsos/FiveThirtyEight | Jan 14–15, 2020 | 43.6% | 44.2% | | 47.1% | | 18.1% | 31.2% | 15% | | | | | | | | | | | | | |
| YouGov/Economist | Jan 11–14, 2020 | 43% | 49% | −34% | 53% | 11% | 21% | 29% | 15% | 1% | 3% | 28% | −7% | 42% | | | | | | | | |
| Ipsos/FiveThirtyEight | Jan 10–13, 2020 | 45.3% | 47.8% | | 43.3% | | 12.3% | 26.5% | 9.9% | | | | | | | | | | | | | |
| Morning Consult | Jan 6–12, 2020 | 49% | 59% | −6% | 47% | 23% | 21% | 34% | 21% | 6% | 8% | 32% | 4% | 32% | | | | | | | | |
| YouGov/Economist | Jan 5–7, 2020 | 43% | 55% | −31% | 60% | 4% | 26% | 36% | 19% | 8% | 10% | 34% | −2% | 44% | −22% | | | | | | | |
| Morning Consult | Dec 30, 2019 – Jan 5, 2020 | 52% | 56% | −8% | 44% | 17% | 21% | 34% | 20% | 4% | 8% | 31% | 3% | 29% | −6% | | | | | | | |
| YouGov/Economist | Dec 28–31, 2019 | 48% | 49% | −25% | 55% | −6% | 32% | 32% | 23% | 6% | 9% | 39% | −2% | 40% | −21% | 34% | | | | | | |
| Morning Consult | Dec 23–29, 2019 | 51% | 56% | −8% | 55% | 15% | 22% | 35% | 19% | 5% | 8% | 32% | 4% | 31% | −3% | 17% | | | | | | |
| YouGov/Economist | Dec 22–24, 2019 | 42% | 48% | −40% | 59% | −5% | 28% | 35% | 19% | 6% | 6% | 40% | −1% | 48% | −21% | 38% | | | | | | |
| Morning Consult | Dec 20–22, 2019 | 49% | 55% | −12% | 44% | 17% | 26% | 33% | 19% | 4% | 8% | 34% | 3% | 28% | −5% | 19% | | | | | | |
| Ipsos/FiveThirtyEight | Dec 19–20, 2019 | 45% | 42.6% | | 42.9% | | 17.1% | 27.6% | 7.4% | | | 22.3% | | | | | | | | | | |
| Ipsos/FiveThirtyEight | Dec 13–18, 2019 | 43.2% | 40.5% | | 40.1% | | 11% | 29.4% | 4.2% | | | 16.1% | | | | | | | | | | |
| YouGov/Economist | Dec 14–17, 2019 | 45% | 47% | −21% | 56% | −3% | 26% | 27% | 15% | 1% | 9% | 35% | −3% | 38% | −17% | 29% | | | | | | |
| CNN/SSRS | Dec 12–15, 2019 | 42% | 54% | | 47% | | | 32% | | | | | | | | | | | | | | |
| Morning Consult | Dec 9–15, 2019 | 49% | 57% | −1% | 44% | 14% | 21% | 30% | 15% | 4% | 10% | 27% | 4% | 31% | −4% | 17% | | | | | | |
| Echelon Insights | Dec 9–14, 2019 | 67% | 56% | | 48% | 14% | | 40% | | | | | | | | | | | | | | |
| YouGov/Economist | Dec 7–10, 2019 | 45% | 49% | −19% | 55% | −9% | 25% | 33% | 5% | 3% | 5% | 25% | −9% | 41% | −17% | 27% | | | | | | |
| Quinnipiac | Dec 4–9, 2019 | 56% | 60% | | 54% | 9% | 32% | 39% | | | | | | | | | | | | | | |
| Monmouth | Dec 4–8, 2019 | 56% | 53% | | 61% | 1% | | 35% | | | | 25% | | | | | | | | | | |
| Morning Consult | Dec 2–8, 2019 | 50% | 57% | −5% | 47% | 13% | 22% | 32% | 15% | 4% | 6% | 28% | 3% | 32% | −5% | 18% | | | | | | |
| YouGov/Economist | Dec 1–3, 2019 | 43% | 48% | −19% | 53% | −5% | 23% | 37% | 8% | 6% | 11% | 28% | −1% | 43% | −18% | 38% | 37% | 7% | −2% | | | |
| Morning Consult | Nov 25 – Dec 1, 2019 | 50% | 54% | −4% | 42% | 9% | 20% | 34% | 14% | 5% | 8% | 26% | 1% | 28% | −4% | 17% | 28% | | | | | |
| YouGov/Economist | Nov 24–26, 2019 | 46% | 51% | −17% | 52% | −11% | 29% | 38% | 8% | 4% | 12% | 30% | 5% | 46% | −14% | 31% | 37% | 8% | 1% | | | |
| Morning Consult | Nov 21–24, 2019 | 45% | 56% | −6% | 44% | 1% | 18% | 35% | 11% | 1% | 6% | 28% | 2% | 32% | −5% | 17% | 32% | 4% | | | | |
| Ipsos/Reuters | Nov 21–22, 2019 | 55% | 68% | | 57% | 3% | | 38% | | −6% | | | | | | | | | | | | |
| Ipsos/FiveThirtyEight | Nov 20–21, 2019 | 44.5% | 44% | −17% | 48.7% | | 14.3% | 37.3% | 2.1% | | | 16.9% | | 26.3% | | | 25.9% | | | | | |
| YouGov/Economist | Nov 17–19, 2019 | 50% | 45% | −20% | 59% | 4% | 28% | 46% | 10% | 6% | 13% | 31% | 0% | 39% | −15% | 31% | 37% | 8% | 1% | −3% | | |
| Ipsos/FiveThirtyEight | Nov 14–18, 2019 | 47.9% | 42.7% | −12.5% | 46.2% | | 10.3% | 34.4% | 1.3% | | | 12.4% | | 24.6% | | | 24.8% | | | | | |
| Morning Consult | Nov 11–17, 2019 | 52% | 57% | 0% | 48% | 5% | 20% | 34% | 11% | 4% | 10% | 24% | 3% | 31% | −6% | 16% | 29% | 4% | | | | |
| Ipsos/Reuters | Nov 12–14, 2019 | 62% | 67% | | 59% | 15% | | 45% | | | | | | | | | | | | | | |
| YouGov/Economist | Nov 10–12, 2019 | 37% | 52% | | 58% | 6% | 25% | 38% | −2% | 13% | −5% | 29% | | 44% | −21% | 30% | 41% | −3% | | −1% | | |
| Morning Consult | Nov 4–10, 2019 | 54% | 56% | | 50% | | 25% | 32% | −1% | 3% | 3% | 13% | | 16% | | | 36% | 5% | −6% | | 22% | |
| YouGov/Economist | Nov 3–5, 2019 | 42% | 50% | −16% | 64% | | 23% | 39% | 16% | | 9% | 30% | −3% | 37% | −13% | 32% | 36% | 4% | 3% | −2% | | |
| Change Research/Crooked Media | Oct 31 – Nov 3, 2019 | 42% | 48% | | 63% | | | 46% | | | | | | | | | 35% | | | | | |
| Monmouth | Oct 30 – Nov 3, 2019 | 57% | 47% | | 70% | | | 33% | | | | | | | | | 33% | | | | | |
| Morning Consult | Oct 28 – Nov 3, 2019 | 54% | 56% | −1% | 50% | | 22% | 33% | 13% | | 5% | 25% | 3% | 32% | −6% | 16% | 36% | 3% | | | | |
| YouGov/Kalikow School at Hofstra University | Oct 25–31, 2019 | 66.7% | 69.6% | | 70.6% | | | | | | | | | | | | | | | | | |
| YouGov/Economist | Oct 27–29, 2019 | 49% | 51% | −13% | 62% | | 21% | 45% | 5% | | 11% | 30% | 0% | 39% | −17% | 29% | 37% | 5% | −5% | −5% | 35% | |
| Morning Consult | Oct 21–27, 2019 | 55% | 59% | −2% | 53% | | 18% | 35% | 12% | | 8% | 26% | 4% | 31% | −5% | 15% | 36% | 6% | | | 27% | 5% |
| Echelon Insights | Oct 21–25, 2019 | 58% | 53% | | 61% | | | 43% | | | | | | | | | 40% | | | | | |
| YouGov/Economist | Oct 20–22, 2019 | 39% | 53% | −8% | 64% | | 24% | 42% | 12% | | 10% | 27% | 0% | 43% | −16% | 31% | 38% | 5% | −3% | 0% | 33% | 1% |
| CNN/SSRS | Oct 17–20, 2019 | 54% | 58% | | 50% | | 22% | 39% | | | | | | 46% | | | | | | | | |
| Morning Consult | Oct 16–20, 2019 | 49% | 56% | 3% | 54% | | 23% | 36% | 12% | | 5% | 26% | 5% | 32% | −6% | 19% | 36% | 5% | | | 30% | 5% |
| Ipsos/Reuters | Oct 17–18, 2019 | 66.91% | 55.83% | 9.59% | 61.59% | | 25.38% | 33.66% | 14.9% | | | 27.17% | | 36.13% | | 20.66% | 40.64% | | | | 29.84% | |
| Morning Consult | Oct 16, 2019 | 48% | 55% | 8% | 51% | | 25% | 43% | 13% | | 11% | 29% | 5% | 31% | −5% | 19% | 35% | 5% | | | 29% | 9% |
| Ipsos/FiveThirtyEight | Oct 15–16, 2019 | 48.6% | 45.3% | −6.7% | 54.3% | | 15% | 33.5% | 2% | | | 14.5% | | 25.3% | | 8.2% | 28.4% | | | | 17% | |
| YouGov/Economist | Oct 13–15, 2019 | 45% | 48% | 5% | 63% | | 27% | 43% | 8% | | 12% | 31% | 1% | 37% | −11% | 31% | 39% | 9% | 1% | −2% | 37% | 1% |
| Lord Ashcroft Polls | Oct 1–15, 2019 | 55.05% | 58.30% | | 44.17% | | 4.93% | 14.68% | | | | 13.71% | | 17.89% | | | 28.58% | | | | 17.68% | |
| Ipsos/FiveThirtyEight | Oct 7–14, 2019 | 47.4% | 43.1% | 2.2% | 52.1% | | 11.8% | 31% | −0.8% | | | 14.2% | | 26.3% | | 11.6% | 30.7% | | | | 22.6% | |
| HarrisX | Oct 12–13, 2019 | 62% | 44% | 11% | 53% | | 16% | 34% | 13% | | | 21% | | 31% | | 20% | 38% | | | | 31% | |
| Quinnipiac | Oct 11–13, 2019 | 60% | 54% | | 70% | | | | | | | | | | | | | | | | | |
| Morning Consult | Oct 7–12, 2019 | 55% | 57% | 11% | 51% | | 20% | 33% | 10% | | 4% | 25% | 3% | 31% | −2% | 16% | 36% | 5% | | | 28% | 3% |
| Fox News | Oct 6–8, 2019 | 58% | 63% | | 63% | | | 38% | | | | | | 35% | | | 41% | | | | 34% | |
| YouGov/Economist | Oct 6–8, 2019 | 40% | 55% | 0% | 66% | | 23% | 42% | 7% | | 8% | 33% | −3% | 41% | −17% | 27% | 36% | 8% | 1% | 0% | 29% | 3% |
| Morning Consult | Sep 30 – Oct 6, 2019 | 53% | 55% | 11% | 54% | | 20% | 34% | 8% | | 9% | 23% | 0% | 33% | −2% | 17% | 38% | 3% | | | 31% | 5% |
| YouGov/Economist | Sep 28 – Oct 1, 2019 | 36% | 37% | −1% | 60% | | 25% | 46% | 9% | | 13% | 32% | −1% | 38% | −21% | 29% | 32% | 8% | 1% | −2% | 35% | 5% |

### Before October 2019

Favorability polling prior to October 2019 :
| Poll source | Date(s) administered | Biden | Sanders | Gabbard | Warren | Bloomberg | Klobuchar | Buttigieg | Steyer | Bennet | Yang | Delaney | Booker | Williamson | Castro | Harris | Bullock | Sestak | Messam | O'Rourke | Ryan | de Blasio | Gillibrand | Moulton | Inslee | Hickenlooper | Gravel | Swalwell |
| Monmouth | Sep 23–29, 2019 | 52% | 56% | | 66% | | | 41% | | | 25% | | | | | 42% | | | | | | | | | | | | |
| Morning Consult | Sep 23–29, 2019 | 54% | 54% | 9% | 52% | | 21% | 35% | 9% | 8% | 23% | 2% | 31% | −3% | 14% | 35% | 3% | | | 30% | 4% | | | | | | | |
| YouGov/Economist | Sep 22–24, 2019 | 46% | 49% | 10% | 63% | | 20% | 42% | 9% | 9% | 32% | 1% | 34% | −8% | 26% | 40% | 6% | 2% | 0% | 33% | 4% | | | | | | | |
| Quinnipiac | Sep 19–23, 2019 | 53% | 47% | | 64% | | 22% | 39% | −1% | | 13% | | 31% | | 7% | 34% | | | | 25% | | | | | | | | |
| Morning Consult | Sep 16–22, 2019 | 50% | 53% | 9% | 52% | | 23% | 34% | 7% | 7% | 24% | 4% | 33% | −3% | 8% | 35% | 4% | | | 30% | 3% | | | | | | | |
| YouGov/Economist | Sep 14–17, 2019 | 41% | 43% | 33% | 60% | | 23% | 44% | 2% | 9% | 24% | −5% | 35% | −17% | 8% | 30% | 2% | −6% | −8% | 38% | −6% | −11% | | | | | | |
| HarrisX | Sep 14–16, 2019 | 64% | 53% | | 49% | | 14% | 35% | | | 17% | | 33% | | 14% | 37% | | | | 33% | | | | | | | | |
| Ipsos/FiveThirtyEight | Sep 12–16, 2019 | 47.1% | 44.3% | | 52.9% | | 11.8% | 35.8% | | | 14.5% | | 29.4% | | 9.6% | 32.5% | | | | 31.2% | | | | | | | | |
| Morning Consult | Sep 13–15, 2019 | 54% | 59% | 11% | 52% | | 21% | 33% | 8% | 6% | 22% | 3% | 30% | −6% | 11% | 38% | 6% | | | 31% | 1% | −4% | | | | | | |
| HarrisX | Sep 10–11, 2019 | 60% | 58% | | 50% | | 24% | 30% | | | 27% | | 33% | | 27% | 34% | | | | 34% | | | | | | | | |
| Ipsos/FiveThirtyEight | Sep 5–11, 2019 | 45.7% | 44% | | 48.5% | | 8.1% | 32.2% | | | 14.8% | | 26.7% | | 19.8% | 31.4% | | | | 23.9% | | | | | | | | |
| Ipsos/Reuters | Sep 9–10, 2019 | 72.9% | 73.92% | 16.52% | 57.6% | | 24.48% | 32.66% | 15.08% | 11.34% | 26.98% | 14.04% | 34.5% | 13.44% | 22.94% | 48.18% | 10.4% | 6.76% | 5.76% | 39.42% | 16.43% | 20.91% | | | | | | |
| YouGov/Economist | Sep 8–10, 2019 | 39% | 46% | 0% | 61% | | 19% | 42% | 8% | 12% | 33% | −2% | 35% | −15% | 38% | 42% | 6% | 0% | −6% | 33% | −3% | −8% | | | | | | |
| NPR/PBS/Marist | Sep 5–8, 2019 | 49% | 39% | | 64% | | 17% | 41% | −1% | | 19% | | 38% | | 26% | 39% | | | | 29% | | | | | | | | |
| Morning Consult | Sep 2–8, 2019 | 52% | 57% | 10% | 49% | | 20% | 36% | 9% | 10% | 25% | 5% | 33% | −1% | 21% | 38% | 7% | | | 31% | 2% | −2% | | | | | | |
| YouGov/FairVote | Sep 2–6, 2019 | 43% | 45% | −4% | 61% | | 15% | 40% | −2% | 5% | 25% | −11% | 31% | −20% | 32% | 38% | 0% | −2% | −4% | 29% | −5% | −22% | | | | | | |
| ABC/Washington Post | Sep 2–5, 2019 | 65% | 70% | | 63% | | | 41% | | | | | | | | 47% | | | | | | | | | | | | |
| YouGov/Economist | Sep 1–3, 2019 | 36% | 50% | 3% | 60% | | 10% | 30% | 0% | 8% | 31% | −1% | 34% | −10% | 31% | 39% | 2% | −3% | −3% | 34% | 0% | −9% | | | | | | |
| Morning Consult | Aug 26 – Sep 1, 2019 | 52% | 55% | 11% | 49% | | 20% | 32% | 9% | 8% | 22% | 3% | 31% | −1% | 22% | 38% | 6% | | | 34% | 3% | −3% | 20% | | | | | |
| YouGov/Economist | Aug 24–27, 2019 | 48% | 55% | 12% | 64% | | 29% | 48% | 8% | 12% | 32% | −3% | 41% | −3% | 42% | 50% | 7% | 3% | 1% | 42% | −2% | −1% | 26% | | | | | |
| Morning Consult | Aug 19–25, 2019 | 56% | 57% | 13% | 48% | | 20% | 34% | 11% | 7% | 23% | 3% | 31% | 0% | 23% | 35% | 7% | | | 34% | 6% | −1% | 20% | | | | | |
| Echelon Insights | Aug 19–21, 2019 | 59% | 55% | | 42% | | | 28% | | | | | | | | 43% | | | | | | | | | | | | |
| YouGov/Economist | Aug 17–20, 2019 | 40% | 53% | 2% | 63% | | 14% | 37% | 6% | 7% | 22% | −8% | 36% | −8% | 33% | 40% | 6% | −5% | −4% | 33% | −1% | −8% | 12% | −3% | 11% | | | |
| Monmouth | Aug 16–20, 2019 | 41% | 40% | | 52% | | 9% | 29% | −16% | | 12% | | 35% | −11% | 22% | 39% | 9% | −6% | | 19% | | | | | | | | |
| Morning Consult | Aug 12–18, 2019 | 52% | 55% | 10% | 48% | | 19% | 36% | 10% | 8% | 23% | 3% | 34% | 0% | 23% | 37% | 6% | | | 36% | 6% | −2% | 20% | 0% | 9% | | | |
| HarrisX | Aug 14–15, 2019 | 51% | 45% | | | | | 25% | 6% | 4% | 21% | | | 0% | | 40% | 10% | 2% | 3% | | | | 23% | −3% | | 8% | | |
| HarrisX | Aug 13–14, 2019 | | | 2% | 46% | | 14% | | | | | 6% | 25% | | 17% | | | | | 29% | 8% | 0% | | | 9% | | | |
| Fox News | Aug 11–13, 2019 | 66% | 75% | | 71% | | | | | | | | | | | 61% | | | | | | | | | | | | |
| YouGov/Economist | Aug 10–13, 2019 | 41% | 39% | 4% | 60% | | 20% | 45% | 5% | 12% | 32% | 1% | 36% | −8% | 34% | 42% | 9% | 3% | −1% | 44% | 1% | −17% | 20% | −3% | 18% | 5% | | |
| Morning Consult | Aug 5–11, 2019 | 57% | 53% | 12% | 47% | | 20% | 32% | 11% | 7% | 21% | 2% | 29% | 1% | 21% | 36% | 7% | | | 34% | 6% | −4% | 18% | 3% | 9% | 9% | | |
| YouGov/Economist | Aug 3–6, 2019 | 39% | 43% | 4% | 53% | | 20% | 40% | 4% | 11% | 23% | −3% | 36% | −9% | 31% | 30% | 6% | −3% | 2% | 28% | −1% | −8% | 17% | −2% | 16% | 6% | −1% | |
| Morning Consult | Aug 1–4, 2019 | 55% | 52% | 12% | 46% | | 20% | 33% | 8% | 8% | 19% | 2% | 26% | 0% | 24% | 30% | 5% | | | 23% | 1% | −7% | 17% | 2% | 9% | 6% | | |
| Public Policy Polling | Aug 1–4, 2019 | 59% | 36% | <7% | 35% | | 12% | 24% | <7% | 7% | 9% | <7% | 27% | <7% | 20% | 26% | <7% | <7% | <7% | 13% | <7% | <7% | <7% | <7% | <7% | <7% | <7% | |
| YouGov/Economist | Jul 27–30, 2019 | 47% | 45% | 2% | 65% | | 22% | 43% | 5% | −2% | 16% | −2% | 39% | −4% | 39% | 48% | 11% | −1% | 5% | 30% | −14% | −5% | 9% | −2% | 17% | 3% | −2% | |
| HarrisX | Jul 28–29, 2019 | 61% | 38% | | | | | 30% | 18% | 9% | 18% | | | 8% | | 43% | 10% | 13% | 12% | | | | 22% | 14% | | 12% | 13% | |
| HarrisX | Jul 27–28, 2019 | | | 11% | 49% | | 15% | | | | | 10% | 29% | | 22% | | | | | 27% | 14% | 9% | | | 8% | | | 9% |
| Morning Consult | Jul 22–28, 2019 | 56% | 52% | 9% | 45% | | 21% | 33% | 9% | 7% | 15% | 3% | 30% | −3% | 23% | 41% | 5% | | | 27% | 4% | −5% | 21% | 3% | 9% | 9% | | |
| Democracy Corps | Jul 18–28, 2019 | | 51% | | 43% | | | 31% | | | | | | | | 39% | | | | | | | | | | | | |
| Echelon Insights | Jul 23–27, 2019 | 59% | 57% | | 46% | | | 38% | | | | | | | | 50% | | | | | | | | | | | | |
| YouGov/Economist | Jul 21–23, 2019 | 47% | 43% | 2% | 55% | | 30% | 41% | 9% | 14% | 14% | 5% | 42% | −5% | 41% | 48% | 11% | 6% | 3% | 36% | 4% | 3% | 21% | 8% | 20% | 15% | 6% | |
| Morning Consult | Jul 15–21, 2019 | 54% | 51% | 11% | 45% | | 20% | 33% | 7% | 9% | 14% | 5% | 31% | −2% | 21% | 44% | 5% | | | 26% | 4% | −3% | 22% | 2% | 8% | 8% | | |
| YouGov/Economist | Jul 14–16, 2019 | 51% | 46% | 3% | 59% | | 29% | 39% | 6% | 10% | 12% | 4% | 48% | −7% | 39% | 54% | 6% | 4% | 0% | 33% | 9% | 4% | 22% | 2% | 18% | 10% | 4% | |
| Morning Consult | Jul 8–14, 2019 | 51% | 52% | 7% | 46% | | 16% | 34% | | 5% | 12% | 2% | 30% | −7% | 24% | 40% | 4% | | | 25% | 2% | −4% | 18% | 0% | 7% | 8% | | 5% |
| Gallup | Jul 1–12, 2019 | 52% | 55% | | 46% | | 18% | 33% | | | | | 31% | | 21% | 43% | | | | 18% | | 1% | | | | | | |
| YouGov/Economist | Jul 7–9, 2019 | 47% | 41% | 6% | 55% | | 24% | 40% | | 10% | 4% | −2% | 35% | −16% | 35% | 49% | 6% | 1% | −6% | 28% | 4% | 1% | 20% | −1% | 11% | 3% | 1% | 9% |
| Morning Consult | Jul 1–7, 2019 | 56% | 57% | 7% | 50% | | 20% | 35% | | 6% | 12% | 3% | 30% | −2% | 25% | 41% | 4% | | | 26% | 3% | −3% | 13% | 9% | 9% | 5% | | 6% |
| YouGov/Economist | Jun 30 – Jul 2, 2019 | 47% | 43% | 10% | 58% | | 31% | 43% | | 13% | 15% | 7% | 49% | −11% | 47% | 59% | 12% | 4% | 3% | 32% | 10% | 2% | 27% | 6% | 21% | 14% | 1% | 17% |
| CNN/SSRS | Jun 28–30, 2019 | 51% | 49% | | 52% | | | 37% | | | | | 26% | | 34% | 50% | | | | | | | | | | | | |
| Morning Consult/FiveThirtyEight | Jun 26–30, 2019 | 54.8% | 57.8% | 9.1% | 60.8% | | 23.1% | 37.6% | | 7.2% | 13.5% | 3% | 40.4% | −4.8% | 35.4% | 54.1% | | | | 24.2% | 5.1% | −1.7% | 19.6% | | 7.2% | 4% | | 7.3% |
| HarrisX | Jun 28–29, 2019 | 51% | 45% | | | | | 26% | | 3% | −4% | | | −4% | | 40% | 4% | −6% | −6% | | | | 16% | −4% | | −4% | −1% | 10% |
| HarrisX | Jun 27–28, 2019 | | | 12% | 52% | | 18% | | | | | 9% | 32% | | 32% | | | | | 29% | 17% | 7% | | | 17% | | | |
| Morning Consult | Jun 27–28, 2019 | 50% | 44% | 4% | 51% | | 19% | 37% | | 6% | 10% | 1% | 33% | −1% | 25% | 41% | 7% | | | 20% | 4% | −6% | 15% | 1% | 4% | 10% | | 4% |
| HarrisX | Jun 26–27, 2019 | 63% | 49% | | | | | 32% | | 8% | 17% | | | 8% | | 42% | 7% | 6% | 6% | | | | 24% | 4% | | −8% | 8% | 11% |
| HarrisX | Jun 25–26, 2019 | | | 10% | 42% | | 22% | | | | | 12% | 30% | | 19% | | | | | 40% | 14% | 2% | | | 11% | | | |
| Morning Consult/FiveThirtyEight | Jun 19–26, 2019 | 60.4% | 56.7% | 5.8% | 49.9% | | 19.9% | 35.2% | | 8.6% | 15.2 | 6.8% | 33.9% | 4.2% | 20% | 44.9% | | | | 35.9% | 7.7% | −2.1% | 21% | | 9.1% | 7.5% | | 9.8% |
| YouGov/Economist | Jun 22–25, 2019 | 56% | 50% | 2% | 56% | | 28% | 39% | | 11% | 16% | 8% | 43% | 10% | 30% | 47% | 9% | | 4% | 42% | 7% | −2% | 27% | 5% | 15% | 10% | 4% | 17% |
| Echelon Insights | Jun 22–25, 2019 | 64% | 53% | | 46% | | | 33% | | | | | | | | 40% | | | | | | | | | | | | |
| Morning Consult | Jun 17–23, 2019 | 60% | 57% | 6% | 44% | | 22% | 32% | | 6% | 13% | 4% | 29% | 4% | 18% | 37% | 7% | | | 32% | 4% | −2% | 19% | 4% | 7% | 9% | | 7% |
| YouGov/Economist | Jun 16–18, 2019 | 48% | 43% | 4% | 54% | | 25% | 43% | | 12% | 14% | 5% | 45% | 3% | 26% | 47% | 8% | | 5% | 40% | 5% | −4% | 26% | 3% | 15% | 10% | 3% | 19% |
| Morning Consult | Jun 10–16, 2019 | 62% | 56% | 6% | 45% | | 20% | 33% | | 10% | 13% | 6% | 34% | 6% | 18% | 40% | 7% | | | 34% | 5% | 0% | 22% | 3% | 11% | 9% | | 10% |
| WPA Intelligence (R) | Jun 10–13, 2019 | 71% | 55% | | 57% | | | 48% | | | | | 49% | | | 63% | | | | 50% | | | | | | | | |
| YouGov/Economist | Jun 9–11, 2019 | 47% | 39% | −3% | 49% | | 16% | 42% | | 7% | 7% | 3% | 36% | −2% | 24% | 45% | 4% | | −2% | 32% | 9% | −7% | 24% | 0% | 13% | −1% | −1% | 9% |
| Morning Consult | Jun 3–9, 2019 | 62% | 55% | 7% | 43% | | 20% | 31% | | 7% | 11% | 6% | 33% | 6% | 17% | 40% | 6% | | | 33% | 9% | −2% | 21% | 4% | 10% | 8% | | 9% |
| YouGov/Economist | Jun 2–4, 2019 | 54% | 47% | 0% | 55% | | 26% | 42% | | 10% | 13% | 3% | 47% | 3% | 30% | 54% | 6% | | 2% | 38% | 9% | 7% | 26% | 7% | 16% | 11% | −1% | 21% |
| Morning Consult | May 27 – Jun 2, 2019 | 61% | 55% | 4% | 40% | | 19% | 32% | | 4% | 10% | 4% | 31% | 3% | 16% | 38% | 3% | | | 33% | 5% | 0% | 18% | 4% | 6% | 5% | | 6% |
| CNN/SSRS | May 28–31, 2019 | 65% | 61% | | 52% | | | 33% | | 3% | | | | | | 43% | −2% | | | | | −3% | | | | | | |
| Morning Consult | May 20–26, 2019 | 62% | 57% | 5% | 36% | | 19% | 29% | | 4% | 10% | 5% | 32% | 3% | 15% | 40% | 4% | | | 35% | 1% | 0% | 22% | 2% | 9% | 7% | | 8% |
| Echelon Insights | May 20–21, 2019 | 72% | 53% | | 38% | | | 33% | | | | | | | | 43% | | | | | | | | | | | | |
| Change Research | May 18–21, 2019 | 48% | 50% | 7% | 67% | | 20% | | | | 14% | 2% | 38% | 1% | 25% | 56% | | | 0% | 40% | 0% | −7% | 18% | 1% | 12% | 5% | | 13% |
| Monmouth | May 16–20, 2019 | 57% | 44% | 7% | 46% | | 22% | 24% | | 11% | −1% | 1% | 28% | 0% | 18% | 49% | 0% | | −6% | 21% | 0% | −9% | 11% | 2% | 9% | 11% | −5% | 11% |
| Quinnipiac | May 16–20, 2019 | 65% | 50% | −2% | 45% | | 20% | 34% | | 7% | 3% | 5% | 36% | 3% | 19% | 46% | 2% | | 0% | 21% | 2% | −22% | 14% | −3% | 12% | 6% | | 8% |
| Morning Consult | May 13–19, 2019 | 62% | 58% | 5% | 41% | | 18% | 31% | | 5% | 9% | 5% | 33% | 3% | 15% | 37% | 4% | | | 36% | 4% | 1% | 18% | 2% | 7% | 7% | | 7% |
| Morning Consult | May 6–12, 2019 | 63% | 57% | 6% | 36% | | 16% | 31% | | 5% | 10% | 5% | 31% | | 17% | 38% | 1% | | | 31% | 0% | 6% | 19% | 1% | 8% | 7% | | 8% |
| Morning Consult | Apr 29 – May 5, 2019 | 61% | 55% | 6% | 40% | | 19% | 29% | | | 7% | 4% | 31% | | 15% | 38% | 3% | | | 31% | 2% | | 18% | 1% | 7% | 7% | | |
| Gallup | Apr 17–30, 2019 | 60% | 57% | | 40% | | | 30% | | | | | 31% | | | 42% | | | | 26% | | | | | | | | |
| CNN/SSRS | Apr 25–28, 2019 | 69% | | | | | | 26% | | | | | | | | | | | | | 3% | | 14% | −5% | | | | 3% |
| Morning Consult | Apr 22–28, 2019 | 62% | 58% | 5% | 39% | | 16% | 27% | | | 8% | 5% | 32% | | 16% | 37% | 2% | | | 33% | 2% | | 18% | 2% | 8% | 8% | | |
| Morning Consult | Apr 15–21, 2019 | 61% | 59% | 5% | 36% | | 15% | 29% | | | 10% | 5% | 32% | | 16% | 37% | 3% | | | 36% | 3% | | 18% | | 10% | 7% | | |
| Change Research | Apr 12–15, 2019 | 56% | 45% | 7% | 52% | | 22% | 52% | | 6% | 8% | 2% | 43% | 2% | 31% | 51% | | | 0% | 49% | 2% | | 15% | | 9% | 5% | | 14% |
| Echelon Insights | April 17–19, 2019 | 54% | 62% | | | | | 24% | | | | | | | | 27% | | | | 32% | | | | | | | | |
| Monmouth | Apr 11–15, 2019 | 56% | 44% | | 32% | | 14% | 29% | | | | | 24% | | | 40% | | | | 31% | | | | | | | | |
| Morning Consult | Apr 8–14, 2019 | 60% | 58% | 5% | 35% | | 16% | 23% | | | 10% | 4% | 31% | | 16% | 36% | 4% | | | 35% | 1% | | 16% | | 8% | 9% | | |
| Morning Consult | Apr 1–7, 2019 | 60% | 57% | 6% | 35% | | 19% | 20% | | | 5% | 3% | 33% | | 14% | 34% | 3% | | | 35% | 0% | | 19% | | 6% | 7% | | |
| Morning Consult | Mar 25–31, 2019 | 67% | 63% | 5% | 37% | | 18% | 14% | | | | 4% | 31% | | 15% | 36% | 3% | | | 32% | | | 20% | | 8% | 8% | | |
| Morning Consult | Mar 18–24, 2019 | 68% | 60% | 5% | 34% | | 15% | 11% | | | | 3% | 33% | | 14% | 36% | 2% | | | 33% | | | 18% | | 7% | 7% | | |
| CNN/SSRS | Mar 14–17, 2019 | | 60% | | | | 13% | | | | | | 33% | | | | | | | 36% | | | | | 8% | 5% | | |
| Morning Consult | Mar 11–17, 2019 | 65% | 60% | 5% | 38% | | 15% | 8% | | | | 3% | 28% | | 17% | 35% | 3% | | | 34% | | | 18% | | 7% | 6% | | |
| Change Research | Mar 8–10, 2019 | 71% | 53% | | 62% | | | | | | | | | | | 49% | | | | 57% | | | | | | | | |
| Morning Consult | Mar 4–10, 2019 | 68% | 60% | 5% | 36% | | 15% | 6% | | | | 3% | 30% | | 13% | 40% | 2% | | | 36% | | | 18% | | 5% | 4% | | |
| Monmouth | Mar 1–4, 2019 | 63% | 53% | | 30% | 1% | 13% | | | 6% | | | 31% | 4% | | 42% | 0% | | | 26% | | −6% | | | 7% | | | |
| Morning Consult | Feb 25 – Mar 3, 2019 | 68% | 60% | 5% | 35% | 10% | 15% | 6% | | | | 3% | 31% | | 13% | 41% | 2% | | | 35% | | | 18% | | 5% | 4% | | |
| Gallup | Feb 12–28, 2019 | 71% | | | 35% | | 21% | | | | | | 33% | | | 42% | | | | | | | 22% | | | | | |
| Morning Consult | Feb 18–24, 2019 | 64% | 60% | 4% | 37% | 10% | 18% | 5% | | | | 4% | 28% | | 15% | 35% | 2% | | | 33% | | | 17% | | 2% | 5% | | |
| Morning Consult | Feb 11–17, 2019 | 67% | 61% | 3% | 39% | 13% | 22% | 5% | | | | 2% | 34% | | 15% | 40% | 3% | | | 32% | | | 21% | | 2% | 4% | | |
| Morning Consult | Feb 4–10, 2019 | 69% | 57% | 2% | 34% | 12% | 15% | 4% | | | | 3% | 31% | | 13% | 41% | 1% | | | 31% | | | 18% | | 5% | 5% | | |
| Morning Consult/Politico | Feb 1–2, 2019 | 74% | 61% | | 43% | | 18% | | | | | | 38% | | | 43% | | | | 37% | | | | | | | | |
| CNN/SSRS | Jan 30 – Feb 2, 2019 | | | 2% | 41% | | | 4% | | | | | | | 16% | 43% | | | | | | | 15% | | | | | |
| Morning Consult/Politico | Jan 25–27, 2019 | 69% | 55% | | 45% | | 12% | 3% | | | | | 26% | | | 41% | | | | 26% | | | | | | | | |
| Monmouth | Jan 25–27, 2019 | 71% | 49% | 12% | 40% | 10% | 15% | 2% | | | 0% | 9% | 33% | | 15% | 33% | | | | 32% | | | 16% | | 3% | 4% | | |
| Morning Consult/Politico | Jan 18–22, 2019 | 66% | 58% | | 46% | | 15% | | | | | | 30% | | | 38% | | | | 33% | | | 22% | | | | | |
| HarrisX | Jan 15–16, 2019 | | | 3% | | | | | | | | | | 12% | | | | | | | | | | | 9% | | | |
| Morning Consult/Politico | Jan 11–14, 2019 | 68% | 57% | | 39% | | 15% | | | | | | 30% | | | 35% | | | | 29% | | | | | | | | |
| NPR/PBS/Marist | Jan 10–13, 2019 | 64% | 29% | | 36% | 0% | 13% | | | | | | 30% | | 13% | 26% | | | | 29% | | | 8% | | | | | |
| Morning Consult/Politico | Jan 4–6, 2019 | 71% | 59% | | 33% | | 8% | | | | | | 26% | | | 27% | | | | 30% | | | | | | | | |
| HarrisX | Jan 3–4, 2019 | 64% | 52% | | 48% | 7% | 21% | | 20% | | | | 45% | | 22% | 37% | | | | 38% | | | 25% | | | | | |
| Change Research | Dec 14–17, 2018 | 80% | 65% | 20% | 61% | 20% | 28% | | | | | 4% | 50% | | 27% | 53% | | | | 63% | | | | | | | | 14% |
| Quinnipiac | Dec 12–17, 2018 | 77% | 61% | | 48% | 17% | | | | | | | 41% | | | 37% | | | | 41% | | | 21% | | | | | |
| CNN/SSRS | Dec 6–9, 2018 | 66% | 64% | | 38% | | | | | | | | 30% | | | 31% | | | | 34% | | | | | | | | |
| Morning Consult/Politico | Nov 7–9, 2018 | | | | | | | | | | | | | | | | | | | 32% | | | | | | | | |
| GQR Research | Jul 21–26, 2018 | 53% | 57% | | 34% | | | | | | | | | | | | | | | | | | | | | | | |
| RABA Research | Jan 10–11, 2018 | 72% | 57% | | 53% | | | | | | | | | | | | | | | | | | | | | | | |
| Public Policy Polling | Dec 3–6, 2016 | 67% | 67% | | 46% | | | | | | | | 19% | | 0% | | | | | | | | 9% | | | | | |