Statewide opinion polling for the 2020 Democratic Party presidential primaries

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This is a list of statewide public opinion polls that have been conducted relating to the Democratic primaries for the 2020 United States presidential election. The persons named in the polls are declared candidates or have received media speculation about their possible candidacy.

Given the large number of potential 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. The statewide polls are ordered by the scheduled date of the state's primary or caucus. 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[edit]

The Democratic National Committee has determined that candidates may 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. Should more than 20 candidates meet either threshold, then candidates meeting both thresholds will 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 are 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.^[1] Open-ended polls do not count towards the polling threshold.^[2]

For the third and fourth primary debates, candidates will be required to meet both polling and fundraising thresholds, with the prior considering 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 has also been increased, to 130,000 unique donors with at least 400 in 20 different states.^[3]

Individuals who have been included in national Democratic primary polls but have either ruled out their candidacy or not expressed interest in running include Stacey Abrams, Michael Avenatti, Sherrod Brown, Hillary Clinton, Mark Cuban, Andrew Cuomo, Al Franken, Eric Garcetti, 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 in the four early primary states[edit]

The following Morning Consult^[4] weekly poll archive^[5][6][7] graph depicts the evolution of the standing of each candidate in the early primary states (Iowa, New Hampshire, Nevada and South Carolina) since February 2019.

Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.

Polling for Super Tuesday[edit]

The following Morning Consult^{[8][9][10][11][12][13][14][15]} graph depicts the evolution of the standing of each candidate in the March 3, 2020 Super Tuesday states (Alabama, Arkansas, California, Colorado, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Utah, Vermont, and Virginia) since January 7, 2020.

Graphs are unavailable due to technical issues. There is more info on Phabricator and on MediaWiki.org.

Primary and caucus calendar[edit]

The following dates reflect either the confirmed or expected dates of Democratic primaries and caucuses in 2020. Those for contests in U.S. territories with no date yet set are based on dates estimated by The Green Papers based on past years. The pledged delegate numbers listed below are based on the presidential votes in 2008, 2012, and 2016, as well as the number of electoral votes of each state in 2020. The number of DNC members and distinguished party leaders in the count of unpledged PLEO (party leaders and elected officials) delegates is based on the 2016 Democratic National Convention, while the number of unpledged officeholders (governors, members of Congress, and their equivalents in non-state jurisdictions) reflects their current total. The numbers of pledged delegates do not yet account for delegate bonuses or penalties from timing or clustering.^[16][17][18]

States listed with a lavender background and an asterisk (*) do not yet have a date set by existing statute. States with a light yellow background and a dagger (†) are set to shift their primary or caucus date following the expected passage of legislation moving the dates of their contests. If not already listed as such, the date to which the contest is expected to be moved is listed in parentheses. Party-run primaries (also described as either a firehouse primary or caucus in some jurisdictions) are listed with two asterisks (**).^[16][17][18]

2020 Democratic Primaries and Caucuses

Date	State/territory	Type	Eligibility	P	U	T
Feb 3	Iowa	Caucus	Closed	41	8	49
Feb 11	New Hampshire	Primary	Mixed	24	9	33
Feb 22	Nevada	Caucus	Closed	36	12	48
Feb 29	South Carolina	Primary	Open	54	9	63
Mar 3	Alabama	Primary	Open	52	9	61
	American Samoa*	Caucus	Open	6	5	11
	Arkansas	Primary	Open	31	5	36
	California	Primary	Mixed	416	79	495
	Colorado	Primary	Mixed	67	13	80
	Maine	Primary	Closed	24	8	32
	Massachusetts	Primary	Mixed	91	23	114
	Minnesota	Primary	Closed	75	17	92
	North Carolina	Primary	Mixed	110	12	122
	Oklahoma	Primary	Mixed	37	5	42
	Tennessee	Primary	Open	64	9	73
	Texas	Primary	Closed	228	34	262
	Utah	Primary	Mixed	29	6	35
	Vermont	Primary	Open	16	7	23
	Virginia	Primary	Open	99	25	124
Mar 3–10	Democrats Abroad	Caucus**	Open	13	4	17
Mar 10	Idaho	Primary	Closed	20	5	25
	Michigan	Primary	Open	125	22	147
	Mississippi	Primary	Open	36	5	41
	Missouri	Primary	Open	68	10	78
	North Dakota	Caucus**	Open	14	4	18
	Washington	Primary	Closed	89	18	107
Mar 14	Northern Marianas*	Caucus	Closed	6	5	11
Mar 17	Arizona	Primary	Closed	67	11	78
	Florida	Primary	Closed	219	29	248
	Illinois	Primary	Open	155	29	184
Apr 7	Wisconsin	Primary	Open	84	13	90
Apr 10	Alaska	Primary**	Closed	15	4	18
Apr 17	Wyoming	Caucus	Closed	13	4	17
Apr 28	Ohio	Primary	Mixed	136	17	153
May 2	Guam*	Caucus	Closed	7	5	11
	Kansas	Primary**	Closed	39	6	39
May 12	Nebraska	Primary	Mixed	29	4	29
May 19	Oregon	Primary	Closed	61	14	66
May 22	Hawaii	Primary**	Closed	24	9	31
Jun 2	Delaware	Primary	Closed	21	11	28
	District of Columbia†	Primary	Closed	20	26	43
	Indiana	Primary	Open	82	7	77
	Maryland	Primary	Closed	96	23	102
	Montana	Primary	Open	19	6	22
	New Mexico	Primary	Closed	34	11	40
	Pennsylvania	Primary	Closed	186	23	176
	Rhode Island	Primary	Mixed	26	9	30
	South Dakota	Primary	Mixed	16	5	19
Jun 6	Virgin Islands*	Caucus	Closed	7	6	13
Jun 9	Georgia	Primary	Open	105	15	120
	West Virginia	Primary	Mixed	28	6	30
Jun 23	Kentucky	Primary	Closed	54	6	52
	New York†	Primary	Closed	273	46	270
Jul 7	New Jersey	Primary	Mixed	126	21	128
Jul 11	Louisiana	Primary	Closed	54	7	57
Jul 12	Puerto Rico	Primary	Open	51	8	59
Aug 11	Connecticut	Primary	Closed	60	15	64
N/A	Unassigned	–	–	–	1	1
Total delegates				3,979	765	4,744

Iowa caucus[edit]

The Iowa Democratic caucus was held on February 3, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Pete Buttigieg	Elizabeth Warren	Amy Klobuchar	Andrew Yang	Tom Steyer	Other	Un- decided[a]
270 to Win	Feb 3, 2020	Jan 22 – Feb 2, 2020	22.6%	18.2%	15.2%	15.6%	11.8%	3.8%	3.6%	3.6%[b]	5.6%
RealClear Politics	Feb 3, 2020	Jan 20 – Feb 2, 2020	23.0%	19.3%	16.8%	15.5%	9.0%	3.3%	3.0%	2.5%[c]	7.6%
FiveThirtyEight	Feb 3, 2020	until Feb 2, 2020[d]	22.2%	20.7%	15.7%	14.5%	10.1%	3.7%	3.6%	2.9%[e]	6.6%
Average			22.6%	19.4%	15.9%	15.2%	10.3%	3.6%	3.4%	3.0%[f]	6.6%

The results of a final poll from The Des Moines Register were not released as scheduled on February 1, after an interviewee complained that Pete Buttigieg was not given as a poll option during their interview, with the omission reportedly attributed to human error. As the polling firm was unable to determine whether the mistake was an isolated incident or not, pollster Ann Selzer decided to withhold the results of the poll altogether, marking the first time in 76 years that the final pre-caucus poll was not released by the Register.^[19][20] The poll was later leaked on Twitter, with results confirmed by FiveThirtyEight showing Sanders in the lead with 22%, followed by Warren with 18%, Buttigieg with 16% and Biden with 13%.^[21]

Polling from December 1, 2019, to February 3, 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
Emerson College	Jan 30 – Feb 2, 2020	853 (LV)	± 3.3%	21%	15%	1%	11%	28%	4%	14%	5%	2%	–
Data for Progress [1]	Jan 28 – Feb 2, 2020	2,394 (LV)	± 1.6%	24%[h]	22%	–	–	28%	–	25%	–	–	–
				18%	18%	2%	9%	22%	4%	19%	6%	2%[i]	–
YouGov/CBS News (MRP)	Jan 22–31, 2020	1,835 (RV)	± 3%	25%	21%	[j]	5%	25%	[j]	16%	[j]	[j]	[j]
David Binder Research/Focus on Rural America	Jan 28–30, 2020	300 (LV)	± 5.7%	46%[k]	–	–	–	40%	–	–	–	–	14%
				15%	19%	3%	11%	17%	3%	15%	1%	2%[l]	12%
American Research Group	Jan 27–30, 2020	400 (LV)	± 4.0%	17%	9%	2%	16%	23%	3%	15%	5%	4%[m]	6%
Civiqs/Data for Progress	Jan 26–29, 2020	615 (LV)	± 4.7%	20%[n]	18%	1%	0%	31%	2%	25%	1%	1%[o]	2%
				15%	15%	2%	8%	28%	2%	21%	5%	0%[p]	2%
Park Street Strategies Archived April 21, 2021, at the Wayback Machine	Jan 24–28, 2020	600 (LV)	± 3.0%	20%	17%	1%	12%	18%	4%	17%	5%	<1%[q]	6%
Monmouth University	Jan 23–27, 2020	544 (LV)	± 4.2%	29%[r]	20%	–	–	25%	–	19%	–	1%[s]	6%
				22%[t]	17%	–	12%	22%	–	16%	5%	<1%[u]	6%
				23%	16%	1%	10%	21%	4%	15%	3%	1%[v]	5%
Civiqs/Iowa State University	Jan 23–27, 2020	655 (LV)	± 4.8%	15%	17%	2%	11%	24%	4%	19%	5%	2%[w]	3%[x]
Emerson College	Jan 23–26, 2020	450 (LV)	± 4.6%	21%	10%	5%	13%	30%	5%	11%	5%	2%[y]	–
Suffolk University/USA Today	Jan 23–26, 2020	500 (LV)	± 4.4%	25.4%	17.6%	0.8%	5.6%	18.6%	2.2%	13.2%	3.0%	13.6%[z]	–
Change Research/Crooked Media	Jan 22–26, 2020	704 (LV)	± 3.7%	22%[aa]	23%	–	–	30%	–	20%	–	–	5%
				18%	19%	1%	10%	27%	4%	15%	4%	2%[ab]	–
Siena College/New York Times	Jan 20–23, 2020	584 (LV)	± 4.8%	23%[ac]	23%	–	–	30%	–	19%	–	–	8%[ad]
				17%	18%	1%	8%	25%	3%	15%	3%	1%[ae]	8%
Morningside College	Jan 17–23, 2020	253 (LV)	± 6.2%	19%	18%	3%	12%	15%	6%	15%	4%	2%[af]	4%
YouGov/CBS News	Jan 16–23, 2020	1401 (RV)	± 3.9%	25%	22%	0%	7%	26%	1%	15%	1%	2%[ag]	1%
Civiqs/Data for Progress[permanent dead link]	Jan 19–21, 2020	590 (LV)	± 4.8%	17%	19%	2%	6%	24%	3%	19%	5%	0%[ah]	5%
David Binder Research/Focus on Rural America	Jan 15–18, 2020	500 (LV)	± 4.4%	24%	16%	1%	11%	14%	4%	18%	3%	2%[ai]	–
Neighbourhood Research and Media/Breitbart	Jan 14–17, 2020	300 (LV)	± 4.8%	23%	17%	–[aj]	11%	10%	2%	15%	2%	6%[ak]	13%
	Jan 13, 2020	Booker withdraws from the race
Monmouth University	Jan 9–12, 2020	405 (LV)	± 4.9%	28%[al]	25%	–	–	24%	–	16%	–	2%[am]	4%
				24%	17%	2%	8%	18%	4%	15%	4%	4%[an]	5%
Selzer/CNN/Des Moines Register	January 2–8, 2020	701 (LV)	± 3.7%	15%	16%	2%	6%	20%	2%	17%	5%	2%[ao]	11%
YouGov/CBS News	Dec 27, 2019 – Jan 3, 2020	953 (RV)	± 3.8%	23%	23%	1%	7%	23%	2%	16%	2%	2%[ap]	1%
KG Polling	Dec 19–23, 2019	750 (LV)	± 3.8%	24%	12%	–	5%	31%	–	13%	10%	–	5%[aq]
Civiqs/Iowa State University	Dec 12–16, 2019	632 (LV)	± 4.9%	15%	24%	3%	4%	21%	2%	18%	3%	4%[ar]	4%
Emerson College	Dec 7–10, 2019	325 (LV)	± 5.4%	23%	18%	2%	10%	22%	3%	12%	2%	8%[as]	–
	Dec 3, 2019	Harris withdraws from the race

Polling during November 2019
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Pete Buttigieg	Tulsi Gabbard	Kamala Harris	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
Civiqs/Iowa State University	Nov 15–19, 2019	614 (LV)	± 4.9%	12%	26%	2%	2%	5%	18%	2%	19%	4%	6%[at]	3%
Des Moines Register/CNN	Nov 8–13, 2019	500 (LV)	± 4.4%	15%	25%	3%	3%	6%	15%	3%	16%	3%	6%[au]	5%
YouGov/CBS News	Nov 6–13, 2019	856 (RV)	± 4.1%	22%	21%	0%	5%	5%	22%	2%	18%	1%	4%[av]	–
Monmouth University	Nov 7–11, 2019	451 (LV)	± 4.6%	19%	22%	2%	3%	5%	13%	3%	18%	3%	6%[aw]	8%
University of Iowa	Oct 28 – Nov 10, 2019	465 (LV)	± 4.6%	15%	16%	3%	2%	1%	18%	3%	23%	3%	2%[ax]	13%
Public Policy Polling	Nov 5–6, 2019	715 (LV)	–	13%	20%	–	3%	9%	14%	6%	21%	3%	–	10%
Quinnipiac University	Oct 30 – Nov 5, 2019	698 (LV)	± 4.5%	15%	19%	3%	4%	5%	17%	3%	20%	3%	4%[ay]	8%
	Nov 1, 2019	O'Rourke withdraws from the race

Polling before November 2019
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
Siena College/New York Times	Oct 25–30, 2019	439 (LV)	± 4.7%	17%	2%	18%	3%	4%	1%	19%	22%	8%[az]	6%
Civiqs/Iowa State University	Oct 18–22, 2019	598 (LV)	± 5%	12%	1%	20%	3%	4%	1%	18%	28%	8%[bb]	4%
Suffolk University/USA Today	Oct 16–18, 2019	500 (LV)	± 4.4%	18%	1%	13%	3%	3%	1%	9%	17%	7%[bc]	29%
Emerson College	Oct 13–16, 2019	317 (LV)	± 5.5%	23%	3%	16%	2%	1%	0%	13%	23%	15%[bd]	–
Firehouse Strategies/Øptimus	Oct 8–10, 2019	548 (LV)	± 3.6%	22%	2%	17%	3%	–[be]	1%	5%	25%	26%[bf]	–[be]
YouGov/CBS News	Oct 3–11, 2019	729 (RV)	± 4.6%	22%	2%	14%	5%	2%	2%	21%	22%	7%[bg]	–
Selzer/CNN/Des Moines Register [2]	Sep 14–18, 2019	602 (LV)	± 4.0%	20%	3%	9%	6%	3%	2%	11%	22%	11%[bh]	14%
David Binder Research	Sep 14–17, 2019	500 (LV)	± 4.4%	25%	2%	12%	5%	8%	1%	9%	23%	9%[bi]	6%
Civiqs/Iowa State University	Sep 13–17, 2019	572 (LV)	± 5.2%	16%	2%	13%	5%	3%	2%	16%	24%	11%[bj]	8%
YouGov/CBS News	Aug 28 – Sep 4, 2019	835	± 4.3%	29%	2%	7%	6%	2%	2%	26%	17%	9%[bk]	–
Change Research	Aug 9–11, 2019	621 (LV)	± 3.9%	17%	3%	13%	8%	2%	3%	17%	28%	9%[bl]	–
Monmouth University	Aug 1–4, 2019	401 (LV)	± 4.9%	28%	1%	8%	11%	3%	<1%	9%	19%	11%[bm]	10%
Firehouse Strategies/Øptimus	Jul 23–25, 2019	630	± 3.3%	23%	2%	7%	12%	–	2%	11%	23%	4%	16%
YouGov/CBS News	Jul 9–18, 2019	706	± 4.4%	24%	3%	7%	16%	4%	1%	19%	17%	9%[bn]	–
	Jul 9, 2019	Steyer announces his candidacy
Change Research	Jun 29 – Jul 4, 2019	420 (LV)	–	16%	1%	25%	16%	1%	2%	16%	18%	5%[bo]	–
David Binder Research	Jun 29 – Jul 1, 2019	600	± 4.0%	17%	2%	10%	18%	4%	1%	12%	20%	9%[bp]	9%
Suffolk University/USA Today	Jun 28 – Jul 1, 2019	500	± 4.4%	24%	2%	6%	16%	2%	1%	9%	13%	6%[bq]	21%
Change Research	Jun 17–20, 2019	308 (LV)	–	27%	5%	17%	4%	2%	1%	18%	20%	7%[br]	–
Selzer/CNN/Des Moines Register	Jun 2–5, 2019	600	± 4.0%	24%	1%	14%	7%	2%	2%	16%	15%	6%[bs]	6%
Change Research	May 15–19, 2019	615 (LV)	± 3.9%	24%	1%	14%	10%	2%	5%	24%	12%	9%[bt]	–
Firehouse Strategies/Øptimus Archived May 6, 2019, at the Wayback Machine	Apr 30 – May 2, 2019	576	± 4.1%	35%	2%	11%	5%	4%	3%	14%	10%	–	16%
	Apr 25, 2019	Biden announces his candidacy
Gravis Marketing Archived April 22, 2019, at the Wayback Machine	Apr 17–18, 2019	590	± 4.0%	19%	4%	14%	6%	4%	5%	19%	6%	7%[bu]	16%
	Apr 14, 2019	Buttigieg announces his candidacy
Monmouth University	Apr 4–9, 2019	351	± 5.2%	27%	3%	9%	7%	4%	6%	16%	7%	7%[bv]	12%
David Binder Research	Mar 21–24, 2019	500	± 4.4%	25%	7%	6%	9%	6%	6%	17%	8%	9%[bw]	7%
Emerson College Archived May 20, 2020, at the Wayback Machine	Mar 21–24, 2019	249	± 6.2%	25%	6%	11%	10%	2%	5%	24%	9%	8%[bx]	–
Public Policy Polling (D)[by]	Mar 14–15, 2019	678	–	29%	4%	–	5%	6%	7%	15%	8%	4%	22%
	Mar 14, 2019	O'Rourke announces his candidacy
Selzer/CNN/Des Moines Register	Mar 3–6, 2019	401	± 4.9%	27%	3%	1%	7%	3%	5%	25%	9%	5%[bz]	10%
	Feb 19, 2019	Sanders announces his candidacy
	Feb 10, 2019	Klobuchar announces her candidacy
	Feb 9, 2019	Warren announces her candidacy
Firehouse Strategies/Øptimus	Jan 31 – Feb 2, 2019	558	± 3.6%	25%	4%	–	17%	5%	4%	10%	11%	1%[ca]	25%
Emerson College	Jan 30 – Feb 2, 2019	260	± 6.0%	29%	4%	0%	18%	3%	6%	15%	11%	15%[cb]	–
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
	Jan 11, 2019	Gabbard announces her candidacy
Change Research	Dec 13–17, 2018	1,291 (LV)	–	20%	4%	–	7%	5%	19%	20%	7%	18%[cc]	–
Selzer/CNN/Des Moines Register	Dec 10–13, 2018	455	± 4.6%	32%	4%	–	5%	3%	11%	19%	8%	7%[cd]	6%
David Binder Research	Dec 10–11, 2018	500	± 4.4%	30%	6%	–	7%	10%	11%	13%	9%	8%[ce]	6%
David Binder Research	Sep 20–23, 2018	500	± 4.4%	37%	8%	–	10%	–	–	12%	16%	6%[cf]	9%
	Nov 6, 2017	Yang announces his candidacy
Public Policy Polling (D)[cg]	Mar 3–6, 2017	1,062	–	–	17%	–	3%	11%	–	–	–	34%[ch]	32%

New Hampshire primary[edit]

The New Hampshire Democratic primary was held on February 11, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Pete Buttigieg	Elizabeth Warren	Joe Biden	Amy Klobuchar	Andrew Yang	Tulsi Gabbard	Tom Steyer	Other	Un- decided[a]
270 to Win	Feb 10, 2020	Feb 4–9, 2020	27.3%	20.9%	13.1%	12.3%	10.3%	3.0%	2.7%	2.1%	1.9%[ci]	6.4%
RealClear Politics	Feb 10, 2020	Feb 6–9, 2020	28.7%	21.3%	11.0%	11.0%	11.7%	3.7%	3.3%	1.7%	1.3%[cj]	6.3%
FiveThirtyEight	Feb 10, 2020	until Feb 10, 2020[d]	26.0%	21.6%	12.5%	11.7%	10.3%	3.0%	2.9%	2.6%	3.5%[ck]	5.8%
Average			27.3%	21.3%	12.2%	11.7%	10.8%	3.2%	3.0%	2.1%	2.2%[cl]	6.2%
New Hampshire primary results (February 11, 2020)			25.6%	24.3%	9.2%	8.4%	19.7%	2.8%	3.3%	3.6%	2.7%[cm]	–

Polling from January 1, 2020, to February 11, 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
New Hampshire primary (popular vote)	Feb 11, 2020	–	–	8.4%	24.3%	3.3%	19.7%	25.6%	3.6%	9.2%	2.8%	2.7%[cn]	–
AtlasIntel	Feb 8–10, 2020	431 (LV)	± 5.0%	12%	24%	3%	14%	24%	1%	11%	5%	–	6%
Data For Progress[co]	Feb 7–10, 2020	1296 (LV)	± 2.7%	9%	26%	3%	13%	28%	3%	14%	5%	–	–
American Research Group	Feb 8–9, 2020	400 (LV)	–	13%	20%	3%	13%	28%	2%	11%	3%	5%[cp]	2%
Emerson College/WHDH	Feb 8–9, 2020	500 (LV)	± 4.3%	10%	23%	2%	14%	30%	2%	11%	4%	4%[cq]	–
Change Research	Feb 8–9, 2020	662 (LV)	± 3.8%	9%	21%	6%	8%	30%	3%	8%	5%	1%[cr]	9%
Suffolk University/Boston Globe/WBZ-TV	Feb 8–9, 2020	500 (LV)	± 4.4%	12%	19%	3%	14%	27%	2%	12%	3%	3%[cs]	7%
Elucd	Feb 7–9, 2020	492 (LV)	± 4.4%	8%	20%	–[ct]	12%	26%	–[cu]	10%	–[cv]	–[cw]	15%
University of New Hampshire/CNN	Feb 6–9, 2020	365 (LV)	± 5.1%	11%	22%	5%	7%	29%	1%	10%	4%	1%[cx]	10%
Emerson College/WHDH	Feb 7–8, 2020	500 (LV)	± 4.3%	11%	20%	3%	13%	30%	2%	12%	4%	4%[cy]	–
Suffolk University/Boston Globe/WBZ-TV	Feb 7–8, 2020	500 (LV)	± 4.4%	10%	22%	2%	9%	24%	2%	13%	3%	3%[cz]	12%
Boston Herald-FPU-NBC10	Feb 5–8, 2020	512 (LV)	–	14%	20%	0%	6%	23%	2%	16%	3%	3%[da]	13%
YouGov/CBS News	Feb 5–8, 2020	848 (LV)	± 4.3%	12%	25%	2%	10%	29%	1%	17%	1%	3%[db]	–
University of New Hampshire/CNN	Feb 5–8, 2020	384 (LV)	± 5.0%	12%	21%	5%	6%	28%	2%	9%	4%	2%[dc]	11%
Emerson College/WHDH	Feb 6–7, 2020	500 (LV)	± 4.3%	11%	24%	5%	9%	31%	2%	11%	3%	3%[dd]	–
Suffolk University/Boston Globe/WBZ-TV	Feb 6–7, 2020	500 (LV)	± 4.4%	11%	25%	2%	6%	24%	2%	14%	3%	4%[de]	9%
University of Massachusetts Lowell	Feb 4–7, 2020	440 (LV)	± 6.5%	14%	17%	4%	8%	25%	5%	15%	3%	5%[df]	4%
University of New Hampshire/CNN	Feb 4–7, 2020	365 (LV)	± 5.1%	11%	21%	6%	5%	28%	3%	9%	3%	3%[dg]	11%
Emerson College/WHDH Archived February 8, 2020, at the Wayback Machine	Feb 5–6, 2020	500 (LV)	± 4.3%	11%	23%	6%	9%	32%	2%	13%	2%	3%[dh]	–
Suffolk University/Boston Globe/WBZ-TV	Feb 5–6, 2020	500 (LV)	± 4.4%	11%	23%	4%	6%	24%	3%	13%	3%	4%[di]	12%
Marist/NBC News	Feb 4–6, 2020	709 (LV)	± 4.7%	13%	21%	3%	8%	25%	4%	14%	4%	3%[dj]	5%
Suffolk University/Boston Globe/WBZ-TV	Feb 4–5, 2020	500 (LV)	± 4.4%	12%	19%	5%	6%	25%	4%	11%	2%	1%[dk]	15%
Monmouth University	Feb 3–5, 2020	503 (LV)	± 4.4%	17%	20%	4%	9%	24%	3%	13%	4%	2%[dl]	5%
				17%[dm]	22%	–	13%	27%	–	13%	–	3%[dn]	4%
				19%[do]	28%	–	–	28%	–	16%	–	3%[dp]	5%
Emerson College/WHDH	Feb 3–5, 2020	500 (LV)	± 4.3%	12%	21%	5%	11%	31%	1%	12%	4%	2%[dq]	–
Suffolk University/Boston Globe/WBZ-TV	Feb 3–4, 2020	500 (LV)	± 4.4%	15%	15%	5%	6%	24%	5%	10%	3%	1%[dr]	14%
Emerson College/WHDH	Feb 2–4, 2020	500 (LV)	± 4.3%	13%	17%	6%	11%	32%	2%	11%	6%	3%[ds]	–
	Feb 3, 2020	Iowa caucuses
Suffolk University/Boston Globe/WBZ-TV	Feb 2–3, 2020	500 (LV)	± 4.4%	18%	11%	5%	6%	24%	4%	13%	3%	3%[dt]	14%
Emerson College/WHDH	Feb 1–3, 2020	500 (LV)	± 4.3%	13%	12%	4%	12%	32%	5%	13%	5%	4%[du]	–
Emerson College/WHDH	Jan 31 – Feb 2, 2020	500 (LV)	± 4.3%	14%	13%	7%	8%	29%	8%	12%	7%	2%[dv]	–
Saint Anselm College	Jan 29 – Feb 2, 2020	491 (LV)	± 4.4%	19%	14%	3%	11%	19%	5%	11%	4%	2%[dw]	11%
Boston Herald-FPU-NBC10 [3]	Jan 29 – Feb 1, 2020	454 (LV)	± 4.6%	24%	8%	3%	4%	31%	No voters	17%	1%	5%[dx]	7%
University of Massachusetts Lowell	Jan 28–31, 2020	400 (LV)	± 6.4%	22%	12%	5%	6%	23%	6%	19%	2%	1%[dy]	4%
YouGov/UMass Amherst/WCVB	Jan 17–29, 2020	500 (LV)	± 5.3%	20%	12%	5%	5%	25%	5%	17%	4%	2%[dz]	3%
American Research Group	Jan 24–27, 2020	600 (LV)	± 4%	13%	12%	8%	7%	28%	2%	11%	5%	8%[ea]	6%
Boston Herald-FPU-NBC10	Jan 23–26, 2020	407 (LV)	± 4.9%	22%	10%	3%	5%	29%	0%	16%	1%	7%[eb]	9%
Marist/NBC News	Jan 20–23, 2020	697 (LV)	± 4.5%	15%	17%	6%	10%	22%	3%	13%	5%	2%[ec]	7%
University of New Hampshire/CNN	Jan 15–23, 2020	516 (LV)	± 4.3%	16%	15%	5%	6%	25%	2%	12%	5%	2%[ed]	10%
MassINC Polling Group/WBUR	Jan 17–21, 2020	426 (LV)	± 4.8%	14%	17%	5%	6%	29%	2%	13%	5%	4%[ee]	5%[ef]
Suffolk University/Boston Globe	Jan 15–19, 2020	500 (LV)	± 4.4%	15%	12%	5%	5%	16%	3%	10%	6%	3%[eg]	24%
Emerson College/WHDH Archived January 17, 2020, at the Wayback Machine	Jan 13–16, 2020	657 (LV)	± 3.8%	14%	18%	5%	10%	23%	4%	14%	6%	7%[eh]	–
	Jan 13, 2020	Booker withdraws from the race
Boston Herald-FPU-NBC10	Jan 8–12, 2020	434 (LV)	–	26%	7%	4%	2%	22%	2%	18%	2%	7%[ei]	12%
Patinkin Research Strategies/Yang 2020 Archived January 11, 2020, at the Wayback Machine[ej]	Jan 5–7, 2020	600 (LV)	± 4%	21%	17%	7%	6%	19%	6%	10%	5%	3%[ek]	7%
Monmouth University	Jan 3–7, 2020	404 (LV)	± 4.9%	19%	20%	4%	6%	18%	4%	15%	3%	3%[el]	7%
				21%[em]	20%	–	7%	21%	–	15%	5%	5%[en]	8%
				24%[eo]	23%	–	–	21%	–	18%	–	5%[ep]	8%
YouGov/CBS News	Dec 27, 2019 – Jan 3, 2020	487 (LV)	± 5.3%	25%	13%	1%	7%	27%	3%	18%	2%	3%[eq]	–

Polling before January 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Tulsi Gabbard	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Deval Patrick	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
MassINC Polling Group/WBUR	Dec 3–8, 2019	442 (LV)	± 4.7%	17%	1%	18%	5%	–	3%	–	<1%	15%	12%	5%	11%[er]	12%[es]
	Dec 3, 2019	Harris withdraws from the race
Emerson College	Nov 22–26, 2019	549 (LV)	± 4.1%	14%	2%	22%	6%	4%	2%	–	0%	26%	14%	5%	7%[et]	–
Boston Globe/Suffolk University	Nov 21–24, 2019	500 (LV)	–	12%	2%	13%	6%	3%	1%	–	1%	16%	14%	4%	6%[eu]	21%
Saint Anselm College	Nov 13–18, 2019	255 (RV)	± 6.1%	15%	3%	25%	3%	1%	6%	–	0%	9%	15%	2%	5%[ev]	13%
	Nov 14, 2019	Patrick announces his candidacy
YouGov/CBS News	Nov 6–13, 2019	535 (RV)	± 5%	22%	1%	16%	0%	3%	3%	–	–	20%	31%	1%	1%[ew]	–
Quinnipiac University	Nov 6–10, 2019	1,134 (LV)	± 3.8	20%	1%	15%	6%	1%	3%	–	–	14%	16%	4%	5%[ex]	14%
	Nov 1, 2019	O'Rourke withdraws from the race
University of New Hampshire/CNN	Oct 21–27, 2019	574 (LV)	± 4.1%	15%	2%	10%	5%	3%	5%	2%	–	21%	18%	5%	4%[ey]	10%
Boston Herald/FPU	Oct 9–13, 2019	422 (LV)	± 4.8%	24%	2%	9%	1%	4%	2%	0%	–	22%	25%	1%	4%[ez]	7%
Firehouse Strategies/Øptimus	Oct 8–10, 2019	610 (LV)	± 3.7%	18%	2%	7%	–[fa]	2%	–[fa]	1%	–	9%	25%	2%	32%	–[fa]
YouGov/CBS News	Oct 3–11, 2019	506	± 5.4%	24%	1%	7%	2%	4%	2%	1%	–	17%	32%	5%	5%[fb]	–
Saint Anselm College	Sep 25–29, 2019	423	± 4.8%	24%	1%	10%	3%	5%	3%	<1%	–	11%	25%	2%	3%[fc]	9%
Monmouth University	Sep 17–21, 2019	401	± 4.9%	25%	2%	10%	2%	3%	2%	1%	–	12%	27%	2%	3%[fd]	9%
HarrisX/No Labels	Sep 6–11, 2019	595	± 4.0%	22%	3%	5%	6%	5%	1%	1%	–	21%	15%	2%	5%[fe]	14%
Boston Herald/FPU	Sep 4–10, 2019	425	± 4.8%	21%	1%	5%	3%	6%	1%	2%	–	29%	17%	5%	2%[ff]	9%
Emerson College Archived September 10, 2019, at the Wayback Machine	Sep 6–9, 2019	483	± 4.4%	24%	4%	11%	6%	8%	1%	1%	–	13%	21%	3%	7%[fg]	–
YouGov/CBS News	Aug 28 – Sep 4, 2019	526	± 5.2%	26%	2%	8%	1%	7%	1%	1%	–	25%	27%	1%	1%[fh]	–
Gravis Marketing	Aug 2–6, 2019	250	± 6.2%	15%	0%	8%	5%	7%	4%	2%	–	21%	12%	4%	8%[fi]	11%
Suffolk University	Aug 1–4, 2019	500	± 4.4%	21%	1%	6%	3%	8%	1%	0%	–	17%	14%	1%	6%[fj]	21%
Firehouse Strategies/Øptimus	Jul 23–25, 2019	587	± 3.3%	21%	1%	8%	–	13%	–	0%	–	13%	16%	1%	7%	19%
YouGov/CBS News	Jul 9–18, 2019	530	± 5%	27%	1%	7%	2%	12%	1%	2%	–	20%	18%	1%	5%[fk]	–
University of New Hampshire/CNN	Jul 8–15, 2019	386	± 5.0%	24%	2%	10%	1%	9%	0%	2%	–	19%	19%	1%	4%[fl]	9%
Saint Anselm College	Jul 10–12, 2019	351	± 5.2%	21%	1%	12%	1%	18%	3%	0%	–	10%	17%	5%	3%[fm]	11%
Change Research Archived July 13, 2019, at the Wayback Machine	Jul 6–9, 2019	1,084	± 3.0%	19%	1%	13%	3%	15%	1%	1%	–	20%	22%	1%	3%[fn]	–
Change Research	Jun 29 – Jul 4, 2019	420	–	13%	2%	14%	2%	13%	1%	2%	–	26%	24%	2%	4%[fo]	–
Change Research	Jun 17–20, 2019	308	–	24%	0%	14%	1%	3%	1%	4%	–	28%	21%	1%	3%[fp]	–
YouGov/CBS News	May 31 – Jun 12, 2019	502	± 4.9%	33%	3%	10%	0%	7%	1%	4%	–	20%	17%	1%	2%[fq]	–
Tel Opinion Research*	May 20–22, 2019	600	± 4.0%	33%	–	7%	–	7%	–	1%	–	12%	11%	–	–	28%
Monmouth University	May 2–7, 2019	376	± 5.1%	36%	2%	9%	0%	6%	2%	2%	–	18%	8%	1%	2%[fr]	11%
Change Research	May 3–5, 2019	864	± 3.3%	26%	2%	12%	1%	8%	1%	3%	–	30%	9%	2%	4%[fs]	–
Firehouse Strategies/Øptimus Archived May 6, 2019, at the Wayback Machine	Apr 30 – May 2, 2019	551	± 4.0%	34%	1%	10%	–	7%	1%	3%	–	16%	9%	–	–	19%
Suffolk University	Apr 25–28, 2019	429	± 4.7%	20%	3%	12%	1%	6%	1%	3%	–	12%	8%	1%	4%[ft]	27%
	Apr 25, 2019	Biden announces his candidacy
University of New Hampshire	Apr 10–18, 2019	241	± 6.3%	18%	3%	15%	1%	4%	2%	3%	–	30%	5%	2%	5%[fu]	12%
	Apr 14, 2019	Buttigieg announces his candidacy
Saint Anselm College	Apr 3–8, 2019	326	± 5.4%	23%	4%	11%	1%	7%	2%	6%	–	16%	9%	–	9%[fv]	13%
	Mar 14, 2019	O'Rourke announces his candidacy
University of New Hampshire	Feb 18–26, 2019	240	± 6.3%	22%	3%	1%	1%	10%	4%	5%	–	26%	7%	–	6%[fw]	14%
Emerson College Archived February 23, 2019, at the Wayback Machine	Feb 21–22, 2019	405	± 4.8%	25%	5%	1%	–	12%	8%	5%	–	27%	9%	–	10%[fx]	–
	Feb 19, 2019	Sanders announces his candidacy
YouGov/UMass Amherst	Feb 7–15, 2019	337	± 6.4%	28%	3%	–	–	14%	1%	6%	–	20%	9%	–	9%[fy]	9%
	Feb 10, 2019	Klobuchar announces her candidacy
	Feb 9, 2019	Warren announces her candidacy
Firehouse Strategies/Øptimus	Jan 31 – Feb 2, 2019	518	± 4.1%	22%	4%	–	–	13%	2%	2%	–	13%	9%	–	0%[fz]	35%
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
	Jan 11, 2019	Gabbard announces her candidacy
Change Research	Jan 2–3, 2019	1,162	–	24%	3%	–	–	4%	2%	9%	–	26%	11%	–	22%[ga]	–
University of New Hampshire	Aug 2–19, 2018	198	± 7.0%	19%	6%	–	–	3%	–	–	–	30%	17%	–	12%[gb]	12%
Suffolk University	Apr 26–30, 2018	295	± 5.7%	20%	8%	–	–	4%	–	–	4%	13%	26%	–	4%[gc]	18%
				30%	10%	–	–	6%	–	–	8%	25%	–	–	6%[gd]	12%
University of New Hampshire	Apr 13–22, 2018	188	± 7.1%	26%	5%	–	–	6%	1%	–	–	28%	11%	–	9%[ge]	13%
University of New Hampshire	Jan 28 – Feb 10, 2018	219	± 6.6%	35%	3%	–	–	1%	0%	–	–	24%	15%	–	7%[gf]	15%
	Nov 6, 2017	Yang announces his candidacy
University of New Hampshire	Oct 3–15, 2017	212	± 6.7%	24%	6%	–	–	1%	1%	–	–	31%	13%	–	14%[gg]	11%

Head-to-head polls
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Bernie Sanders	Elizabeth Warren	Undecided
Tel Opinion Research	May 20–22, 2019	600	± 4.0%	63%	21%	–	–	15%
				66%	–	22%	–	13%
				58%	–	–	29%	13%
American Research Group	Mar 21–27, 2018	400	± 5.0%	47%	–	45%	–	7%
				58%	–	–	33%	8%

Nevada caucus[edit]

The Nevada Democratic caucus was held on February 22, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Pete Buttigieg	Elizabeth Warren	Tom Steyer	Amy Klobuchar	Others	Undecided[a]
270 to Win	Feb 21, 2020	Feb 14–21, 2020	30.0%	16.7%	14.0%	13.7%	9.7%	9.7%	1.3%[gh]	4.9%
RealClear Politics	Feb 21, 2020	Feb 19–21, 2020	32.5%	16.0%	16.0%	14.0%	9.0%	9.5%	2.0%[gi]	1.0%
FiveThirtyEight	Feb 21, 2020	until Feb 21, 2020[d]	30.5%	14.4%	15.3%	11.8%	10.2%	8.9%	11.0%[gj]	–[gk]
Average			31.0%	15.7%	15.1%	13.2%	9.6%	9.4%	4.7%[gl]	2.0%
Nevada caucus results, first alignment (February 22, 2020)			34.0%	17.6%	15.4%	12.8%	9.1%	9.6%	1.5%[gm]	–

Tabulation of individual polls of the 2020 Nevada Democratic Caucus
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
Nevada caucuses (first alignment vote)	Feb 22, 2020	–	–	17.6%	–	15.4%	–	9.6%	–	34%	9.1%	12.8%	0.6%	1%[gn]	–
Data for Progress[4][go]	Feb 19–21, 2020	1010 (LV)	± 2.8%	16%	–	15%	–	8%	–	35%	8%	16%	–	2%[gp]	–
AtlasIntel	Feb 19–21, 2020	517 (LV)	± 4.0%	11%	–	14%	–	5%	–	38%	11%	9%	–	7%[gq]	5%
Emerson College	Feb 19–20, 2020	425 (LV)	± 4.7%	16%	–	17%	–	11%	–	30%	10%	12%	–	4%[gr]	–
	Feb 15–18, 2020	Early voting occurred in the Nevada caucuses[22]
Point Blank Political	Feb 13–15, 2020	256 (LV)	± 5.6%	14.3%	–	12.6%	–	15.6%	–	13%	18.6%	7.1%	–	1.7%[gs]	17.1%
Beacon Research/Tom Steyer	Feb 12–15, 2020	600 (LV)	–	19%	–	13%	–	7%	–	24%	18%	10%	–	4%[gt]	6%
Data for Progress[5][gu]	Feb 12–15, 2020	766 (LV)	± 3.4%	14%	–	15%	–	9%	–	35%	10%	16%	–	2%[gv]	–
WPA Intelligence/Las Vegas Review-Journal/AARP Nevada	Feb 11–13, 2020	413 (LV)	± 4.8%	18%	–	10%	–	10%	–	25%	11%	13%	–	5%[gw]	8%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
	Jan 13, 2020	Booker withdraws from the race
Suffolk University/USA Today[6]	Jan 8–11, 2020	500 (LV)	± 4.4%	19%	2%	8%	–	4%	–	18%	8%	11%	4%	4%[gx]	22%
https://www.yang2020.com/wp-content/uploads/Myers-Research-Nevada.pdf Archived January 11, 2020, at the Wayback Machine	Jan 5–8, 2020	635	± 4.0%	23%	3%	6%	–	2%	–	17%	12%	12%	4%	13%[gy]	6%
	Dec 3, 2019	Harris withdraws from the race
YouGov/CBS News	Nov 6–13, 2019	708 (RV)	± 4.7%	33%	2%	9%	4%	2%	–	23%	2%	21%	1%	2%[gz]	–
Fox News	Nov 10–13, 2019	627	± 4.0%	24%	1%	8%	4%	2%	–	18%	5%	18%	3%	4%[ha]	10%
Emerson Polling	Oct 31 – Nov 2, 2019	451 (LV)	± 4.6%	30%	1%	5%	5%	1%	–	19%	3%	22%	5%	10%[hb]	–
Mellman Group/The Nevada Independent	Oct 28 – Nov 2, 2019	600 (LV)	± 4.0%	29%	1%	7%	3%	3%	0%	19%	4%	19%	3%	3%[hc]	9%
	Nov 1, 2019	O'Rourke withdraws from the race
CNN/SSRS	Sep 22–26, 2019	324 (LV)	± 7.1%	22%	2%	4%	5%	1%	0%	22%	4%	18%	3%	3%[hd]	13%
Suffolk University/USA Today	Sep 19–23, 2019	500 (LV)	–	23%	2%	3%	4%	0%	1%	14%	3%	19%	3%	4%[he]	21%
YouGov/CBS News	Aug 28 – Sep 4, 2019	563 (LV)	± 4.9%	27%	1%	4%	6%	0%	3%	29%	2%	18%	1%	9%[hf]	–
Gravis Marketing	Aug 14–16, 2019	382 (RV)	± 5.0%	25%	3%	5%	9%	2%	0%	10%	6%	15%	2%	13%[hg]	9%
Change Research	Aug 2–8, 2019	439 (LV)	± 4.7%	26%	0%	7%	10%	1%	2%	22%	3%	23%	1%	5%[hh]	–
Morning Consult	Jul 1–21, 2019	749 (RV)	± 4.0%	29%	3%	6%	11%	1%	3%	23%	1%	12%	3%	10%[hi]	–
	Jul 9, 2019	Steyer announces his candidacy
Monmouth University	Jun 6–11, 2019	370 (LV)	± 5.1%	36%	2%	7%	6%	1%	2%	13%	–	19%	2%	3%[hj]	8%
Change Research	May 9–12, 2019	389 (LV)	–	29%	2%	13%	11%	1%	4%	24%	–	12%	1%	4%[hk]	–
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Emerson College Archived April 20, 2019, at the Wayback Machine	Mar 28–30, 2019	310 (LV)	± 5.5%	26%	2%	5%	9%	2%	10%	23%	–	10%	3%	9%[hl]	–

South Carolina primary[edit]

The South Carolina Democratic primary was held on February 29, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tom Steyer	Pete Buttigieg	Elizabeth Warren	Amy Klobuchar	Tulsi Gabbard	Un- decided[hm]
270 to Win	Feb 28, 2020	Feb 23–27, 2020	35.8%	20.2%	13.4%	10.0%	8.2%	5.0%	2.6%	4.8%
RealClear Politics	Feb 28, 2020	Feb 23–27, 2020	39.7%	24.3%	11.7%	11.3%	6.0%	5.7%	2.3%	–[hn]
FiveThirtyEight	Feb 28, 2020	until Feb 27, 2020[d]	38.4%	19.1%	12.4%	8.5%	7.0%	4.3%	2.6%	7.7%[ho]
Average			38.0%	21.2%	12.5%	9.9%	7.1%	5.0%	2.5%	4.9%[hp]
South Carolina primary results (February 29, 2020)			48.7%	19.8%	11.3%	8.2%	7.1%	3.1%	1.3%	–

Polling in January and February 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Tulsi Gabbard	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
South Carolina primary (popular vote)	Feb 29, 2020	–	–	48.65%	–	8.2%	1.26%	3.13%	19.77%	11.34%	7.07%	0.2%	0.38%[hq]	–
Atlas Intel	Feb 25–28, 2020	477 (LV)	± 4.0%	35%	–	8%	2%	4%	24%	12%	7%	–	2%	6%
Emerson College	Feb 26–27, 2020	550 (LV)	± 4.1%	41%	–	11%	2%	6%	25%	11%	5%	–	–	–
Trafalgar Group	Feb 26–27, 2020	1,081 (LV)	± 2.99%	43.9%	–	9.6%	1.7%	5.9%	22.8%	10.5%	5.6%	–	–	–
Data for Progress	Feb 23–27, 2020	1416 (LV)	± 2.6%	34%	–	13%	3%	5%	25%	13%	7%	–	–	–
Change Research [7]/ Post and Courier	Feb 23–27, 2020	543 (LV)	± 5.1%	28%	–	11%	5%	4%	24%	16%	12%	–	–	1%
Starboard Communications	Feb 26, 2020	1,102 (LV)	± 2.82%	40%	–	9%	2%	6%	11%	12%	9%	–	–	12%
	Feb 25, 2020	Tenth Democratic primary debate
Monmouth University	Feb 23–25, 2020	454 (LV)	± 4.6%	36%	–	6%	1%	4%	16%	15%	8%	–	0%	15%
Clemson University	Feb 17–25, 2020	650 (LV)	± 3.8%	35%	–	8%	2%	4%	13%	17%	8%	–	–	12%
East Carolina University	Feb 23–24, 2020	1,142 (LV)	± 3.37%	31%	–	6%	2%	2%	23%	20%	8%	–	–	8%
Public Policy Polling	Feb 23–24, 2020	866 (LV)	± 3.3%	36%	–	7%	6%	3%	21%	7%	8%	–	–	11%[hr]
	Feb 22, 2020	Nevada caucuses
YouGov/CBS News	Feb 20–22, 2020	1,238 (LV)	± 5.5%	28%	–	10%	1%	4%	23%	18%	12%	–	3%[hs]	1%
Marist Poll/NBC News	Feb 18–21, 2020	539 (LV)	± 6.0%	27%	–	9%	3%	5%	23%	15%	8%	–	2%[ht]	9%
		997 (RV)	± 4.0%	25%	–	9%	3%	5%	24%	15%	8%	–	2%[hu]	9%
Winthrop University	Feb 9–19, 2020	443 (LV)	± 4.7%	24%	–	7%	1%	4%	19%	15%	6%	1%[hv]	2%[hw]	22%
University of Massachusetts Lowell	Feb 12–18, 2020	400 (LV)	± 7.5%	23%	–	11%	4%	9%	21%	13%	11%	–	4%[hx]	4%
Change Research/The Welcome Party	Feb 12–14, 2020	1015 (LV)	–	23%	–	15%	1%	8%	23%	20%	9%	–	–	1%
East Carolina University	Feb 12–13, 2020	703 (LV)	± 4.3%	28%	6%	8%	1%	7%	20%	14%	7%	–	0%	8%
	Feb 11–12, 2020	New Hampshire primary; Yang withdraws from the race.
	Feb 3, 2020	Iowa caucus
Zogby Analytics	Jan 31 – Feb 3, 2020	277 (LV)	± 5.9%	28%	4%	7%	4%	2%	20%	15%	11%	1%	0%[hy]	8%
East Carolina University	Jan 31 – Feb 2, 2020	469 (LV)	± 5.3%	37%	1%	4%	2%	2%	14%	19%	8%	3%	0%[hz]	10%
Change Research/ Post and Courier	Jan 26–29, 2020	651 (LV)	± 4%	25%	–	7%	3%	2%	20%	18%	11%	3%	1%[ia]	10%
	Jan 13, 2020	Booker withdraws from the race
GQR Research/Unite the Country[ib]	Jan 9–13, 2020	600 (LV)	–	36%[ic]	–[id]	5%[ie]	–[if]	–[ig]	15%[ih]	12%[ii]	10%[ij]	–[ik]	–[il]	–[im]
Fox News	Jan 5–8, 2020	808 (RV)	± 3.5%	36%	2%	4%	1%	1%	14%	15%	10%	2%	3%[in]	11%

Polling before January 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Tom Steyer	Elizabeth Warren	Other	Undecided
Change Research/ Post and Courier	Dec 6–11, 2019	392 (LV)	± 4.9%	27%	5%	9%	–	–	20%	5%	19%	13%[io]	–
	Dec 3, 2019	Harris withdraws from the race
YouGov/FairVote [8]	Nov 22 – Dec 2, 2019	400 (LV)	± 7.5%	39%	2%	10%	2%	–	13%	7%	10%	13%[ip]	4%
Quinnipiac University	Nov 13–17, 2019	768 (LV)	± 4.8%	33%	2%	6%	3%	–	11%	5%	13%	7%[iq]	18%
YouGov/CBS News	Nov 6–13, 2019	933 (RV)	± 4.2%	45%	2%	8%	5%	–	15%	2%	17%	6%[ir]	–
University of North Florida	Nov 5–13, 2019	426 (LV)	–	36%	2%	3%	4%	–	10%	8%	10%	6%[is]	23%
	Nov 1, 2019	O'Rourke withdraws from the race
Monmouth University	Oct 16–21, 2019	402 (LV)	± 4.9%	33%	2%	3%	6%	1%	12%	4%	16%	7%[it]	15%
Change Research/ Post and Courier	Oct 15–21, 2019	731 (LV)	± 3.6%	30%	3%	9%	11%	1%	13%	5%	19%	11%[iu]	–
Firehouse Strategies/ Øptimus	Oct 8–10, 2019	607 (LV)	± 3.7%	32%	2%	4%	5%	1%	8%	–	16%	33%[iv]	–[iw]
YouGov/CBS News	Oct 3–11, 2019	915 (RV)	±3.9%	43%	3%	4%	7%	1%	16%	2%	18%	6%[ix]	–
Gravis Marketing	Oct 3–7, 2019	516 (LV)	± 4.3%	34%	6%	0%	4%	2%	10%	7%	9%	10%[iy]	19%
Fox News	Sep 29 – Oct 2, 2019	803 (LV)	± 3.5%	41%	3%	2%	4%	0%	10%	4%	12%	8%[iz]	16%
Winthrop University	Sep 21–30, 2019	462 (RV)	± 4.9%	37%	3%	4%	7%	2%	8%	2%	17%	6%[ja]	12%
CNN/SSRS	Sep 22–26, 2019	406 (LV)	± 5.9%	37%	2%	4%	3%	2%	11%	3%	16%	4%[jb]	10%
YouGov/CBS News	Aug 28 – Sep 4, 2019	849 (RV)[jc]	± 4.3%	43%	2%	4%	7%	1%	18%	1%	14%	9%[jd]	–
Change Research	Aug 9–12, 2019	521 (LV)	± 4.3%	36%	4%	5%	12%	1%	16%	1%	17%	7%[je]	–
Firehouse Strategies/ Øptimus	Jul 23–25, 2019	554 (LV)	± 3.8%	31%	2%	4%	10%	0%	9%	–	12%	8%[jf]	24%
Monmouth University	Jul 18–22, 2019	405 (LV)	± 4.9%	39%	2%	5%	12%	1%	10%	2%	9%	3%[jg]	17%
YouGov/CBS News	Jul 9–18, 2019	997 (RV)[jh]	± 3.8%	39%	3%	5%	12%	2%	17%	1%	12%	9%[ji]	–
Fox News	Jul 7–10, 2019	701 (LV)	± 3.5%	35%	3%	2%	12%	0%	14%	0%	5%	3%[jj]	20%
	Jul 9, 2019	Steyer announces his candidacy
Change Research	Jun 29 – Jul 4, 2019	421 (LV)	–	27%	6%	6%	21%	1%	16%	0%	15%	8%[jk]	–
Change Research	Jun 17–20, 2019	308 (LV)	–	39%	5%	11%	9%	5%	13%	0%	15%	5%[jl]	–
Change Research	Jun 11–14, 2019	933 (LV)	± 3.2%	37%	5%	11%	9%	4%	9%	–	17%	8%[jm]	–
YouGov/CBS News	May 31 – Jun 12, 2019	552 (LV)	–	45%	4%	6%	7%	4%	18%	–	8%	8%[jn]	–
Zogby Analytics	May 23–29, 2019	183 (LV)	± 7.2%	36%	4%	7%	4%	2%	13%	–	12%	4%[jo]	–
Tel Opinion Research*	May 22–24, 2019	600 (LV)	± 4.0%	37%	2%	3%	7%	–	10%	–	8%	–	32%
Crantford Research	May 14–16, 2019	381 (LV)	± 5.0%	42%	4%	8%	10%	–	7%	–	8%	–	–
Change Research	May 6–9, 2019	595 (LV)	± 4.0%	46%	4%	8%	10%	2%	15%	–	8%	5%[jp]	–
Firehouse Strategies/ Øptimus Archived May 6, 2019, at the Wayback Machine	Apr 30 – May 2, 2019	568 (LV)	± 4.5%	48%	4%	5%	4%	1%	12%	–	5%	1%[jq]	20%
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Change Research	Mar 31 – Apr 4, 2019	744 (LV)	± 3.6%	32%	9%	7%	10%	9%	14%	–	6%	12%[jr]	–
				–	12%	12%	15%	16%	24%	–	11%	12%[js]	–
	Mar 14, 2019	O'Rourke announces his candidacy
Emerson College Archived April 27, 2019, at the Wayback Machine	Feb 28 – Mar 2, 2019	291 (LV)	± 5.7%	37%	6%	0%	9%	5%	21%	–	5%	16%[jt]	–
Change Research	Feb 15–18, 2019	600 (LV)	± 4.0%	36%	10%	–	13%	8%	14%	–	9%	12%[ju]	–
				–	28%	1%	35%	–	–	–	20%	18%[jv]	–
	Feb 19, 2019	Sanders announces his candidacy
	Feb 9, 2019	Warren announces her candidacy
Firehouse Strategies/ Øptimus	Jan 31 – Feb 2, 2019	557 (LV)	± 4.0%	36%	5%	–	12%	2%	8%	–	4%	2%[jw]	31%

Head-to-head polling
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Pete Buttigieg	Bernie Sanders	Elizabeth Warren	Other	Undecided
YouGov/FairVote[9][jx]	Nov 22 – Dec 2, 2019	400 (LV)	± 7.5%	73%	27%	–	–	–	–
				66%	–	34%	–	–	–
				61%	–	–	29%	[jy]	6%
				–	39%	61%	–	–	–
				–	36%	–	64%	–	–
				–	–	54%	46%	–	–
Tel Opinion Research	May 22–24, 2019	600	± 4.0%	71%	10%	–	–	–	19%
				70%	–	15%	–	–	16%
				67%	–	–	15%	–	18%

Alabama primary[edit]

The Alabama Democratic primary was held on March 3, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 28 – March 2, 2020	44.5%	21.0%	18.0%	11.0%	1.0%	4.5%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	40.2%	18.4%	15.9%	10.9%	0.5%	14.1%
Average			42.35%	19.7%	16.95%	10.95%	0.75%	9.3%
Alabama primary results (March 3, 2020)			63.3%	16.5%	11.7%	5.7%	0.2%	2.6%

Tabulation of individual polls of the 2020 Alabama Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	949 (LV)	± 5.0%	42%	18%	–	3%	–	–	20%	10%	8%[jz]	–
Data for Progress	Feb 28 – Mar 2, 2020	237 (LV)	± 6.4%	47%	18%	–	–	–	–	22%	12%	2%[ka]	–
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 1, 2019	O'Rourke withdraws from the race
SurveyMonkey	July 2–16, 2019	257	± 7.8%	36%	–	2%	5%	13%	1%	15%	9%	10%[kb]	–
Change Research	March 20–23, 2019	1,200	± 2.8%	42%	–	9%	3%	12%	10%	13%	6%	4%[kc]	–
				–	–	14%	4%	16%	17%	27%	12%	9%[kd]	–

Arkansas primary[edit]

The Arkansas Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Michael Bloomberg	Bernie Sanders	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 6–March 2, 2020	27.7%	22.3%	18.7%	11.3%	0.5%	19.5%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	27.5%	21.0%	18.1%	12.5%	0.3%	20.6%
Average			27.6%	21.65%	18.4%	11.9%	0.4%	20.05%
Arkansas primary results (March 3, 2020)			40.5%	16.7%	22.4%	10.0%	0.7%	9.7%

Tabulation of individual polls of the 2020 Arkansas Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	714 (LV)	± 6.0%	28%	25%	8%	17%	10%	13%[ke]	–
Data for Progress	Feb 28–Mar 2, 2020	300 (LV)	± 5.6%	36%	22%	2%	23%	15%	2%[kf]	–
The Progress Campaign (D)[10]	Feb 21–25, 2020	209 (RV)	± 4.9%	17%	17%	18%	19%	12%	6%[kg]	10%[kh]
Hendrix College/Talk Business & Politics	February 6–7, 2020	496 (LV)	± 4.3%	18.5%	19.6%	15.5%	16.4%	8.9%	10.1%[ki]	11%

California primary[edit]

The California Democratic primary was held on March 3, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Elizabeth Warren	Michael Bloomberg	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 20 – March 1, 2020	33.0%	20.0%	14.4%	15.0%	1.2%	16.4%
RealClear Politics	March 3, 2020	February 28 – March 2, 2020	35.0%	23.0%	16.0%	14.0%	1.5%	10.5%[kj]
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	31.2%	21.7%	14.9%	14.7%	0.7%	16.8%
Average			33.1%	21.6%	15.1%	14.6%	1.1%	14.5%
California primary results (March 3, 2020)			36.0%	27.9%	13.2%	12.1%	0.6%	10.2%

Polling from January 1 to March 3, 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Tom Steyer	Elizabeth Warren	Andrew Yang	Other	Undecided
	March 2, 2020	Klobuchar withdraws from the race.
Swayable Archived 2020-03-03 at the Wayback Machine	March 1–2, 2020	3,388 (LV)	± 2.0%	20.8%	19.3%	8.4%	3.3%	28.7%	4.0%	9.6%	–	6.0%[kk]	–
Data for Progress	February 28 – March 2, 2020	516 (LV)	± 4.3%	25%	17%	5%	3%	32%	–	16%	–	1%[kl]	–
AtlasIntel	February 24 – March 2, 2020	727 (LV)	± 4.0%	26%	15%	3%	1%	34%	–	15%	–	2%[km]	4%
	March 1, 2020	Buttigieg withdraws from the race.
Point Blank Political	February 29 – March 1, 2020	1,220 (LV)	± 4.1%	22%	10%	6%	3%	34%	1%	14%	–	1%[kn]	9%
Emerson College/Nexstar	February 29 – March 1, 2020	545 (LV)	± 4.1%	21%	11%	7%	5%	38%	2%	16%	–	1%[ko]	–
	February 29, 2020	South Carolina primary; Steyer withdraws from the race after close of polls.
YouGov/CBS News	February 27–29, 2020	1,411 (LV)	± 4.0%	19%	12%	9%	4%	31%	3%	18%	–	4%[kp]	–
Suffolk University	February 26–29, 2020	500 (LV)	± 4.4%	14%	16%	7%	5%	35%	3%	12%	–	3%[kq]	–
YouGov/Hoover Institution/Stanford University	February 26–28, 2020	1,020 (LV)	–	19%	13%	9%	6%	28%	4%	18%	–	3%[kr]	–
Point Blank Political	February 26–28, 2020	2,276 (LV)	± 2.9%	14%	12%	9%	3%	34%	3%	14%	–	1%[ks]	10%
				40%[kt]	–	–	–	50%	–	–	–	–	11%
				–	32%[ku]	–	–	57%	–	–	–	–	11%
				–	–	–	–	46%[kv]	–	36%	–	–	16%
CNN/SSRS	February 22–26, 2020	488 (LV)	± 5.2%	13%	12%	7%	6%	35%	3%	14%	–	3%[kw]	8%
	February 25, 2020	Tenth Democratic primary debate
Point Blank Political	February 23–25, 2020	2,098 (LV)	± 3.0%	11%	11%	9%	4%	34%	3%	13%	–	2%[kx]	13%
Berkeley IGS/LA Times	Feb 20–25, 2020	3,002 (LV)	± 2.0%	8%	12%	11%	6%	34%	2%	17%	1%	2%[ky]	7%
	February 22, 2020	Nevada caucuses
Change Research/KQED News	February 20–23, 2020	1,069 (LV)	± 3.4%	12%	6%	11%	5%	37%	3%	20%	4%[kz]	3%[la]	–
University of Massachusetts Lowell	February 12–20, 2020	450 (LV)	± 6.7%	13%	12%	12%	7%	24%	2%	16%	–	7%[lb]	6%
Monmouth University	February 16–19, 2020	408 (LV)	± 4.9%	17%	13%	9%	4%	24%	5%	10%	–	3%[lc]	13%
				36%[ld]	–	–	–	44%	–	–	–	15%[le]	5%
				–	31%[lf]	–	–	48%	–	–	–	14%[lg]	6%
				–	–	26%[lh]	–	51%	–	–	–	16%[li]	7%
				–	–	–	24%[lj]	54%	–	–	–	16%[lk]	6%
Public Policy Institute of California	February 7–17, 2020	573 (LV)	± 5.7%	14%	12%	12%	5%	32%	3%	13%	–	2%[ll]	8%
SurveyUSA	February 13–16, 2020	520 (LV)	± 4.8%	15%	21%	12%	6%	25%	3%	9%	–	1%[lm]	9%
YouGov/USC	February 1–15, 2020	–	–	21%	8%	6%	3%	29%	2%	20%	–	2%[ln]	9%[lo]
	February 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls.
Capitol Weekly	February 6–9, 2020	843 (LV)	–	8%[lp]	8%	15%	7%	25%	4%	19%	5%	6%[lq]	3%[lr]
				11%	13%	14%	5%	29%	3%	16%	4%	5%[ls]	1%[lt]
	February 3, 2020	Iowa Caucuses
Change Research/KQED News	January 25–27, 2020	1,967 (LV)	–	15%	4%	8%	3%	30%	2%	16%	5%	4%[lu]	13%
Berkeley IGS/LA Times	January 15–21, 2020	2,895 (LV)	± 2.5%	15.0%	6.0%	7.2%	4.9%	26.3%	1.8%	19.6%	3.9%	3.6%[lv]	11.7%
SurveyUSA	January 14–16, 2020	565 (LV)	± 5.1%	30%	6%	8%	2%	20%	4%	20%	4%	2%[lw]	4%
	January 13, 2020	Booker withdraws from the race.
Public Policy Institute of California/Mercury News	January 3–12, 2020	530 (LV)	± 6.5%	24%	1%	6%	4%	27%	–	23%	3%	5%[lx]	7%
Tulchin Research/USC Rossier/The Hill	January 3–10, 2020	1,121 (LV)	–	25%	7%	8%	2%	29%	3%	12%	5%	2%[ly]	6%
Capitol Weekly	January 1–9, 2020	1,053 (LV)	–	20%	6%	11%	5%	24%	2%	21%	7%	3%[lz]	–

Polling before 1 January 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Change Research/KQED News	December 6–10, 2019	862 (LV)	± 3.3%	19%	3%	12%	–	–	26%	23%	4%	13%[ma]	–
CNN/SSRS	December 4–8, 2019	508 (LV)	± 5.2%	21%	3%	9%	–	–	20%	17%	6%	12%[mb]	11%
Capitol Weekly	December 3–7, 2019	581 (LV)	–[mc]	19%	2%	14%	–	–	19%	23%	5%	17%[md]	1%
				19%	2%	13%	4%	–	19%	21%	5%	17%[me]	0%
	December 3, 2019	Harris withdraws from the race.
Berkeley IGS/LA Times	November 21–27, 2019	1,252 (LV)	–	14%	1%	12%	7%	–	24%	22%	3%	12%[mf]	9%
SurveyUSA	November 20–22, 2019	558 (LV)	± 4.8%	28%	3%	8%	10%	–	18%	13%	5%	11%[mg]	5%
Capitol Weekly	November 1–12, 2019	695 (LV)	–	18%	1%	14%	6%	–	21%	27%	4%	8%[mh]	1%
Public Policy Institute of California	November 3–12, 2019	682 (LV)	–	24%	1%	7%	8%	–	17%	23%	5%	6%[mi]	9%
	November 1, 2019	O'Rourke withdraws from the race.
Change Research Archived 2019-10-24 at the Wayback Machine	October 15–18, 2019	1,631 (LV)	–	19%	1%	9%	8%	1%	24%	28%	3%	6%[mj]	–
SurveyUSA	October 15–16, 2019	553 (LV)	± 6.9%	33%	2%	4%	8%	2%	17%	18%	4%	5%[mk]	8%
Capitol Weekly	October 1–14, 2019	590 (LV)	–	21%	2%	6%	8%	0%	15%	35%	3%	9%[ml]	–
Public Policy Institute of California	September 16–25, 2019	692 (LV)	± 4.9%	22%	2%	6%	8%	1%	21%	23%	3%	7%[mm]	9%
Berkeley IGS/LA Times	September 13–18, 2019	2,272	–	20%	1%	6%	8%	3%	19%	29%	2%	5%[mn]	8%
Emerson College	September 13–16, 2019	424	± 4.7%	26%	1%	4%	6%	5%	26%	20%	7%	4%[mo]	–
SurveyUSA	September 13–15, 2019	547	± 4.8%	27%	2%	3%	13%	2%	18%	16%	7%	4%[mp]	7%
Change Research/KQED	September 12–15, 2019	3,325	± 1.7%	18%	2%	10%	11%	2%	23%	25%	3%	5%[mq]	–
Capitol Weekly	September 1–13, 2019	599	–	18%	1%	7%	11%	2%	21%	29%	4%	5%[mr]	–
Capitol Weekly	September 1–13, 2019	5,510	–	18%	1%	8%	11%	2%	17%	33%	3%	7%[ms]	–
SurveyUSA	August 1–5, 2019	528	± 6.3%	25%	1%	6%	17%	0%	18%	21%	1%	1%[mt]	10%
PPIC	July 14–23, 2019	766	± 4.4%	11%	–	5%	19%	–	12%	15%	–	14%[mu]	25%
YouGov/CBS News	July 9–18, 2019	1,514	± 2.9%	24%	1%	6%	23%	1%	16%	19%	1%	9%[mv]	–
Quinnipiac University	July 10–15, 2019	519	± 5.7%	21%	1%	3%	23%	1%	18%	16%	2%	2%[mw]	10%
Capitol Weekly	July 1–15, 2019	816	–	20%	1%	8%	20%	2%	16%	25%	1%	7%[mx]	–
Change Research Archived 2019-07-31 at the Wayback Machine	July 9–11, 2019	1,609	± 2.5%	17%	1%	8%	23%	2%	20%	22%	2%	5%[my]	–
	July 8, 2019	Swalwell withdraws from the race.
Capitol Weekly[23]	June 1–30, 2019	813	–	23%	2%	8%	14%	2%	19%	23%	2%	9%[mz]	–
UC Berkeley	June 4–10, 2019	2,131	± 3.0%	22%	1%	10%	13%	3%	17%	18%	1%	3%[na]	11%
Capitol Weekly[23]	May 1–31, 2019	1,180	–	29%	2%	9%	17%	4%	22%	11%	0%	6%[nb]	–
Change Research	May 25–28, 2019	1,649	± 2.4%	30%	1%	12%	15%	3%	23%	12%	1%	2%[nc]	–
Capitol Weekly[23]	April 15–30, 2019	1,204	–	20%	2%	19%	17%	4%	20%	10%	–	9%[nd]	–
	April 25, 2019	Biden announces his candidacy.
	April 14, 2019	Buttigieg announces his candidacy.
Change Research	April 6–9, 2019	2,003	± 2.2%	21%	3%	9%	19%	10%	22%	8%	1%	7%[ne]	–
				–	5%	11%	27%	16%	28%	9%	1%	5%[nf]	–
	April 8, 2019	Swalwell announces his candidacy.
Quinnipiac University	April 3–8, 2019	482	± 5.9%	26%	2%	7%	17%	4%	18%	7%	1%	6%[ng]	13%
	March 14, 2019	O'Rourke announces his candidacy.
	February 19, 2019	Sanders announces his candidacy.
Change Research	February 9–11, 2019	948	–	26%	3%	1%	26%	8%	20%	7%	0%	7%[nh]	–
				–	7%	2%	53%	–	–	23%	1%	15%[ni]	–

Colorado primary[edit]

The Colorado Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Elizabeth Warren	Michael Bloomberg	Tulsi Gabbard	Un- decided[a]
270 to Win	March 3, 2020	Feb 24–Mar 2, 2020	29.3%	16.3%	16.0%	15.3%	1.0%	22.1%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 3, 2020[d]	26.8%	18.2%	16.3%	15.8%	0.5%	22.4%
Average			28.0%	17.3%	16.2%	15.6%	0.8%	22.1%
Colorado primary results (March 3, 2020)			37.0%	24.6%	17.6%	18.5%	1.0%	1.3%

Tabulation of individual polls of the 2020 Colorado Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Michael Bennet	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	John Hickenlooper	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	921 (LV)	± 4.0%	–	20%	19%	12%	–	–	29%	12%	–	7%[nj]	–
Data for Progress	Feb 28–Mar 2, 2020	464 (LV)	± 4.2%	–	18%	16%	8%	–	–	32%	21%	–	5%[nk]	–
	Mar 1, 2020	Buttigieg withdraws from the race
Elucd	Feb 26–Mar 1, 2020	561 (LV)	± 4.1%	–	10%	9%	10%	–	–	34%	14%	–	9%[nl]	14%
Magellan Strategies	Feb 24–25, 2020	500 (LV)	± 4.38%	–	11%	11%	12%	–	–	27%	15%	–	9%[nm]	15%
Data for Progress	Feb 23–25, 2020	471 (LV)	± 4.7%	–	10%	14%	14%	–	–	34%	20%	–	7%[nn]	1%
	Feb 11, 2020	New Hampshire primary; Yang and Bennet withdraw from the race
	Dec 3, 2019	Harris withdraws from the race
Emerson College	Aug 16–19, 2019	403 (LV)	± 4.8%	1%	25%	–	5%	13%	–	26%	20%	4%	8%[no]	–
	Aug 15, 2019	Hickenlooper withdraws from the race
Public Policy Polling	Jul 12–14, 2019	519 (LV)	–	5%	22%	–	7%	9%	7%	15%	19%	0%	14%[np]	–

Maine primary[edit]

The Maine Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Undecided[a]
270 to Win	Mar 3, 2020	Feb 10–Mar 2, 2020	28.7%	19.7%	20.0%	13.3%	1.3%	17.0%
RealClear Politics	Mar 3, 2020	Feb 28–Mar 2, 2020	38.5%	24.5%	14.0%	18.0%	–[nq]	5.0%
FiveThirtyEight	Mar 3, 2020	until Mar 2, 2020 [d]	31.1%	21.7%	17.2%	14.2%	0.7%	19.6%
Average			32.8%	22.0%	17.1%	15.2%	1.0%	11.9%
Maine primary results (March 3, 2020)			32.4%	33.4%	11.8%	15.6%	0.9%	5.9%

Tabulation of individual polls of the 2020 Maine Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	209 (LV)	± 9.0%	22%	28%	10%	–	27%	11%	–	3%[nr]	–
Change Research	Mar 1–2, 2020	507 (LV)	–	24%	10%	–	–	43%	16%	–	7%[ns]	–
Data for Progress	Feb 28–Mar 2, 2020	385 (LV)	± 4.9%	25%	18%	1%	–	34%	20%	–	2%[nt]	–
	Mar 1, 2020	Buttigieg withdraws from the race
SocialSphere/Colby College	Feb 10–13, 2020	350 (LV)	–	12%	14%	16%	–	25%	9%	2%	10%[nu]	12%
	Feb 11, 2020	Yang withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
Maine People's Resource Center	Oct 14–21, 2019	728 (LV)	± 3.63%	26.8%	–	9.1%	5.0%	15.4%	22.1%	1.7%	11.4%[nv]	4.4%
Public Policy Polling	Oct 11–13, 2019	366 (LV)	± 5.1%	19%	–	9%	4%	12%	31%	3%	20%[nw]	–[nx]
Gravis Marketing	Jun 24, 2019	243	± 6.3%	25%	–	8%	2%	15%	17%	5%	15%[ny]	11%

Massachusetts primary[edit]

The Massachusetts Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Elizabeth Warren	Joe Biden	Michael Bloomberg	Tulsi Gabbard	Others/ Undecided[nz]
270 to Win	March 3, 2020	Until March 3, 2020	22.4%	21.0%	15.0%	13.6%	1.8%	26.2%
FiveThirtyEight	March 3, 2020	until March 3, 2020 [d]	24.4%	21.0%	18.1%	14.5%	0.4%	21.6%
Average			23.4%	21.0%	16.6%	14.0%	1.1%	23.9%
Massachusetts primary results (March 3, 2020)			26.6%	21.4%	33.4%	11.7%	0.7%	6.1%

Tabulation of individual polls of the 2020 Massachusetts Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Deval Patrick	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race; endorses Biden
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	917 (LV)	± 4.0%	17%	18%	–	11%	–	5%	–	–	27%	15%	8%[oa]	–
Data for Progress	Feb 28–Mar 2, 2020	301 (LV)	± 5.6%	26%	15%	–	2%	–	1%	–	–	26%	28%	2%[ob]	–
	Mar 1, 2020	Buttigieg withdraws from the race; endorses Biden
Suffolk University/Boston Globe/WBZ-TV	Feb 26–29, 2020	500 (LV)	-	11.0%	13.0%	–	12.4%	–	5.0%	–	–	24.2%	22.2%	3.6%[oc]	8.6%
WBUR/MassINC	Feb 23-26, 2020	426 (LV)	± 4.9%	9%	13%	-	14%	-	6%	-	-	25%	17%	9%[od]	8%
UMass Amherst	Feb 18-24, 2020	400 (LV)	± 5.9%	12%	9%	-	14%	-	7%	-	-	25%	23%	8%[oe]	3%
Falchuk & DiNatale	Feb 16-18, 2020	453 (LV)	–	13%	13%	–	13%	–	14%	–	–	17%	16%	5%[of]	8%
University of Massachusetts Lowell	Feb 12-19, 2020	450 (LV)	± 6.1%	14%	12%	–	15%	–	9%	–	–	21%	20%	6%[og]	4%
	Feb 12, 2020	Patrick withdraws from the race
Falchuk & DiNatale	Jan 27-30, 2020	334 (LV)	–	16%	8%	–	6%	–	7%	–	3%	12%	23%	7%[oh]	–
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 14, 2019	Patrick announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
WBUR	Oct 16–20, 2019	456	± 4.6%	18%	–	0%	7%	3%	1%	0%	–	13%	33%	7%[oi]	15%
Suffolk University	Sep 3–5, 2019	500	-	26%	–	1%	5%	3%	0%	1%	–	8%	24%	6%[oj]	25%
	Aug 23, 2019	Moulton withdraws from the race
Suffolk University	Jun 5–9, 2019	370	± 5.1%	22%	–	1%	8%	5%	0%	1%	–	6%	10%	5%[ok]	42%
	Apr 25, 2019	Biden announces his candidacy
	Apr 22, 2019	Moulton announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
Emerson College Archived 2019-04-20 at the Wayback Machine	Apr 4–7, 2019	371	± 5.0%	23%	–	2%	11%	7%	2%	8%	–	26%	14%	8%[ol]	–
	Mar 14, 2019	O'Rourke announces his candidacy
	Feb 19, 2019	Sanders announces his candidacy
	Feb 10, 2019	Klobuchar announces her candidacy
	Feb 9, 2019	Warren announces her candidacy
	Feb 1, 2019	Booker announces his candidacy
	Jan 21, 2019	Harris announces her candidacy
YouGov/UMass Amherst	Nov 7–14, 2018	655	–	19%	–	3%	–	6%	3%	10%	6%	14%	11%	1%[om]	27%

Hypothetical polling with only Biden, Sanders and Warren
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Bernie Sanders	Elizabeth Warren	Undecided
Evan Falchuk and Lou DiNatalie/Commonwealth Magazine	Oct 23-25, 2019	443 (LV)	–	35%	13%	41%	11%

Minnesota primary[edit]

The Minnesota Democratic primary was held on March 3, 2020.^[18] Amy Klobuchar led in pre-election polling, but withdrew from the race the night before the election and endorsed Joe Biden (who went on to win Minnesota).

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Joe Biden	Michael Bloomberg	Tulsi Gabbard	Un- decided[a]
270 to Win	Mar 2, 2020	Feb 20–22, 2020	28.0%	22.0%	13.5%	8.5%	6.0%	2.5%	19.5%
FiveThirtyEight	Mar 2, 2020	until Mar 2, 2020[d]	24.4%	26.2%	14.4%	10.7%	5.6%	1.5%	17.2%
Average			26.2%	24.1%	14.0%	9.6%	5.8%	2.0%	18.3%
Minnesota Primary results (March 3, 2020)			5.6%	29.9%	15.4%	38.6%	8.3%	0.3%	1.8%

Tabulation of individual polls of the 2020 Minnesota Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	1,472 (LV)	± 4.0%	20%	14%	4%	–	21%	–	27%	8%	6%[on]	–
Data for Progress	Feb 28–Mar 2, 2020	650 (LV)	± 3.84%	27%	16%	–	–	2%	–	32%	21%	1%[oo]	–
	Mar 1, 2020	Buttigieg withdraws from the race
Mason-Dixon/Star Tribune/ MPR News Minnesota	Feb 17–20, 2020	500(LV)	± 4.5%	8%	3%	3%	–	29%	–	23%	11%	2%[op]	21%
University of Massachusetts Lowell	Feb 12–19, 2020	450(LV)	± 6.4%	9%	9%	10%	–	27%	–	21%	16%	4%[oq]	4%
	Dec 3, 2019	Harris withdraws from the race
	Nov 1, 2019	O'Rourke withdraws from the race
St. Cloud State University	Oct 14-Nov 1, 2019	177 (LV)	–	15%	–	2%	–	15%	–	12%	15%	–	–
Kaiser Family Foundation	Sep 23–Oct 15, 2019	249	–	14%	–	7%	1%	15%	1%	13%	25%	5%[or]	21%
Change Research	Jun 8–12, 2019	772	± 3.7%	20%	–	11%	4%	16%	3%	19%	21%	5%[os]	–

North Carolina primary[edit]

The North Carolina Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date Updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 21–March 2, 2020	27.8%	25.8%	17.0%	11.6%	0.8%	17.0%
RealClear Politics	March 3, 2020	February 27–March 2, 2020	36.7%	23.3%	14.3%	10.7%	1.0%	14.0%
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	34.5%	22.1%	14.4%	11.3%	0.2%	17.5%
Average			33.0%	23.7%	15.2%	11.2%	0.7%	16.2%
North Carolina primary results (March 3, 2020)			43.0%	24.1%	13.0%	10.5%	0.5%	8.9%

Tabulation of individual polls of the 2020 North Carolina Democratic primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Spry Strategies/Civitas	Mar 1–2, 2020	543 (LV)	± 4.2%	45%	11%	–	3%	–	18%	7%	–	6%[ot]	11%
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	1,209 (LV)	± 3.0%	36%	18%	–	4%	–	23%	10%	–	10%[ou]	–
Data for Progress	Feb 28–Mar 2, 2020	334 (LV)	± 5.3%	36%	18%	–	3%	–	27%	14%	–	3%[ov]	–
	Mar 1, 2020	Buttigieg withdraws from the race
Elucd	Feb 26–Mar 1, 2020	657 (LV)	± 3.8%	25%	15%	–	6%	–	26%	12%	–	6%[ow]	10%
East Carolina University	Feb 27–28, 2020	499 (LV)	± 5.1%	29%	14%	–	4%	–	25%	11%	–	9%[ox]	9%
High Point University Archived 2020-03-02 at the Wayback Machine	Feb 21–28, 2020	274 (LV)	–	14%	20%	–	8%	–	28%	12%	–	13%[oy]	7%
		472 (RV)	–	14%	18%	–	8%	–	31%	11%	–	11%[oz]	7%
Spry Strategies/Civitas	Feb 26–27, 2020	581 (LV)	± 4.1%	27%	16%	–	4%	–	19%	11%	–	10%[pa]	15%
Marist College	Feb 23–27, 2020	568 (LV)	± 5.1%	24%	15%	–	7%	–	26%	11%	–	8%[pb]	7%
		974 (RV)	± 3.9%	22%	15%	–	7%	–	27%	11%	–	9%[pc]	8%
Data for Progress	Feb 23–27, 2020	536 (LV)	± 4.2%	25%	18%	–	10%	–	27%	11%	–	8%[pd]	–
Public Policy Polling	Feb 23–24, 2020	852 (LV)	± 3.4%	23%	17%	–	9%	–	20%	11%	–	8%[pe]	11%[pf]
Meredith College	Feb 16–24, 2020	430 (LV)	–	17.9%	17.0%	0.7%	10.0%	–	19.5%	10.9%	–	7.6%[pg]	16.5%[ph]
Spry Strategies/Civitas	Feb 21–23, 2020	561 (LV)	± 3.75%	20%	20%	–	3%	–	20%	9%	–	13%[pi]	14%
University of Massachusetts Lowell	Feb 12–18, 2020	450 (LV)	± 6.5%	16%	19%	–	10%	–	23%	13%	–	13%[pj]	6%
SurveyUSA/WRAL News	Feb 13–16, 2020	698 (LV)	± 5.0%	20%	22%	–	11%	–	22%	8%	–	7%[pk]	11%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
High Point University Archived 2020-02-12 at the Wayback Machine	Jan 31–Feb 6, 2020	225 (LV)	–	24%	16%	0%	8%	–	20%	11%	3%	9%[pl]	8%
		399 (RV)	–	19%	13%	1%	6%	–	25%	12%	4%	8%[pm]	12%
Public Policy Polling	Feb 4–5, 2020	604 (LV)	–	25%	14%	–	9%	–	16%	12%	5%	7%[pn]	13%[po]
	Jan 13, 2020	Booker withdraws from the race
Public Policy Polling	Jan 10–12, 2020	509 (LV)	–	31%	8%	1%	6%	–	18%	15%	5%	6%[pp]	11%[pq]
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg launches his campaign
Fox News	Nov 10–13, 2019	669	± 3.5%	37%	–	2%	6%	4%	14%	15%	2%	8%[pr]	10%
HighPoint University Archived 2019-11-15 at the Wayback Machine	Nov 1–7, 2019	347[ps]	± 6.4%	33%	–	2%	4%	5%	18%	13%	2%	6%[pt]	10%
		1,049[pu]	± 3.6%	18%	–	2%	4%	4%	15%	7%	2%	7%[pv]	23%
Siena Research/New York Times	Oct 13–26, 2019	324	–	29%	–	1%	1%	1%	13%	15%	0%	3%[pw]	32%
High Point University	Sep 13–19, 2019	348 (A)	–	31%	–	4%	3%	6%	20%	15%	4%	3%[px]	9%
SurveyUSA/Civitas	Aug 1–5, 2019	534	± 6.1%	36%	–	1%	5%	8%	15%	13%	1%	2%[py]	17%
Emerson College Archived 2019-06-04 at the Wayback Machine	May 31 – Jun 3, 2019	397	± 4.9%	39%	–	1%	8%	5%	22%	15%	1%	7%[pz]	–

Oklahoma primary[edit]

The Oklahoma Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 17–March 2, 2020	28.0%	23.7%	16.0%	12.3%	1.5%	18.5%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	30.6%	22.1%	13.7%	13.6%	1.1%	18.9%
Average			29.3%	22.9%	14.85%	12.95%	1.3%	18.7%
Oklahoma primary results (March 3, 2020)			38.7%	25.4%	13.9%	13.4%	1.7%	6.9%

Tabulation of individual polls of the 2020 Oklahoma Democratic primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	472 (LV)	± 6.0%	38%	11%	1%	–	1%	26%	13%	9%[qa]	–
Data for Progress	Feb 28–Mar 2, 2020	300 (LV)	± 5.5%	35%	19%	–	–	–	28%	16%	2%[qb]	–
SoonerPoll	Feb 17–21, 2020	409	4.84%	21%	20%	10%	–	7%	13%	9%	2%[qc]	19%
Cole Hargrave Snodgrass & Associated	Feb 10–13, 2020	172 (LV)	–	12%	20%	1%	–	6%	14%	8%	21%[qd]	9%
	Dec 3, 2019	Harris withdraws from the race
SoonerPoll Archived August 12, 2019, at the Wayback Machine	Jul 17–27, 2019	152	–	26%	–	6%	8%	1%	5%	12%	11%[qe]	34%

Tennessee primary[edit]

The Tennessee Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 28–March 2, 2020	31.0%	27.0%	18.5%	12.0%	0.5%	11.0%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	29.0%	24.7%	15.7%	12.3%	0.2%	18.1%
Average			30.0%	25.85%	17.1%	12.15%	0.35%	14.55%
Tennessee primary results (March 3, 2020)			41.7%	25.0%	15.5%	10.4%	0.4%	7.0%

Tabulation of individual polls of the 2020 Tennessee Democratic Primary
Poll source	Date(s) administered	Sample size	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Other	Undecided
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	1,527 (LV)	± 4.0%	28%	17%	8%	–	27%	9%	11%[qf]	–
Data for Progress	Feb 28–Mar 2, 2020	368 (LV)	± 5.1%	34%	20%	2%	–	27%	15%	3%[qg]	–
	Dec 3, 2019	Harris withdraws from the race
SurveyMonkey	Jul 2–16, 2019	128	± 11.2%	33%	–	6%	12%	13%	18%	11%[qh]	–

Texas primary[edit]

The Texas Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	Mar 2, 2020	Feb 17-Mar 1, 2020	30.2%	25.6%	16.8%	13.6%	1.0%	12.8%
RealClear Politics	Mar 2, 2020	Feb 27-Mar 1, 2020	29.5%	28.0%	18.0%	14.5%	2.0%	8.0%
FiveThirtyEight	March 3, 2020	until March 2, 2020 [d]	28.2%	25.5%	16.5%	13.3%	0.4%	16.1%
Average			29.0%	26.5%	17.1%	13.8%	0.9%	12.6%
Texas primary results (March 3, 2020)			30.0%	34.5%	14.4%	11.4%	0.4%	9.3%

Polling from January 1, 2020, to March 3, 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	1,378 (LV)	± 3.0%	27%	20%	5%	3%	28%	12%	–	6%[qi]	–
Data for Progress	Feb 28–Mar 2, 2020	300 (LV)	± 5.7%	30%	20%	4%	3%	28%	15%	–	1%[qj]	–
AtlasIntel	Feb 24-Mar 2, 2020	486 (LV)	± 4.0%	25%	16%	5%	3%	35%	9%	–	3%[qk]	4%
	Mar 1, 2020	Buttigieg withdraws from the race
Emerson College/Nexstar Archived March 2, 2020, at the Wayback Machine	Feb 29-Mar 1, 2020	450 (LV)	± 4.6%	26%	16%	5%	4%	31%	14%	–	5%[ql]	–
Elucd	Feb 26-Mar 1, 2020	833 (LV)	± 3.4%	20%	14%	7%	5%	31%	13%	–	–	11%
YouGov/CBS News	Feb 27–29, 2020	635 (LV)	± 6.2%	26%	13%	6%	6%	30%	17%	–	2%[qm]	–
Marist College	Feb 23–27, 2020	556 (LV)	± 5.3%	19%	15%	8%	3%	34%	10%	–	2%[qn]	9%
		1,050 (RV)	± 3.7%	18%	16%	8%	3%	35%	8%	–	3%[qo]	9%
Data for Progress	Feb 23–27, 2020	513 (LV)	± 4.3%	21%	21%	9%	5%	30%	13%	–	2%[qp]	–
CNN/SSRS	Feb 22–26, 2020	387 (LV)	± 6.0%	20%	18%	8%	3%	29%	15%	–	0%	5%[qq]
Latino Decisions/Univision/ University of Houston	Feb 21–26, 2020	527 (LV)	± 4.3%	20%	20%	6%	2%	26%	11%	–	7%[qr]	6%
University of Texas at Tyler	Feb 17–26, 2020	586 (LV)	± 4.1%	19%	21%	8%	4%	29%	10%	–	2%[qs]	5%
Public Policy Polling/Progress Texas	Feb 24–25, 2020	1,045 (LV)	± 3.0%	31%	–[qt]	11%	7%	25%	17%	–	4%[qu]	5%[qv]
				24%	17%	10%	4%	24%	14%	–	2%[qw]	5%[qx]
	Feb 22, 2020	Nevada caucuses
University of Massachusetts Lowell	Feb 12–18, 2020	600 (LV)	± 5.9%	20%	18%	7%	9%	23%	14%	–	6%[qy]	3%
YouGov/University of Houston	Feb 6–18, 2020	1,352 (LV)	± 2.7%	20%	12%	11%	7%	20%	17%	–	8%[qz]	5%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race
YouGov/University of Texas/Texas Tribune	Jan 31-Feb 9, 2020	575 (LV)	± 4.09%	22%	10%	7%	3%	24%	15%	6%	13%[ra]	–
University of Texas At Tyler/Dallas News	Jan 21–30, 2020	372 (LV)	± 4.8%	34%	16%	4%	3%	18%	17%	3%	5%[rb]	–
Data for Progress[11][A]	Jan 16–21, 2020	615 (LV)	± 6.5%	26%	7%	10%	4%	20%	14%	3%	3%[rc]	12%
Texas Lyceum[permanent dead link]	Jan 10–19, 2020	401 (LV)	± 4.89%	28%	9%	6%	4%	26%	13%	0%	5%[rd]	7%
	Jan 13, 2020	Booker withdraws from the race
	Jan 2, 2020	Castro withdraws from the race

Polling before January 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Julian Castro	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
CNN/SSRS	Dec 4–8, 2019	327 (LV)	± 6.6%	35%	2%	9%	3%	–	1%	–	15%	13%	3%	11%[re]	9%
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
University of Texas at Tyler	Nov 5–14, 2019	427 (RV)	± 4.7%	28%	1%	8%	3%	5%	2%	–	18%	19%	2%	4%[rf]	–
	Nov 1, 2019	O'Rourke withdraws from the race
University of Texas/ Texas Tribune	Oct 18–27, 2019	541	± 4.2%	23%	1%	6%	2%	5%	2%	14%	12%	18%	4%	4%[rg]	5%
University of Texas at Tyler	Sep 13–15, 2019	474 (RV)	± 4.5%	28%	6%	4%	4%	6%	0%	19%	17%	11%	1%	5%[rh]	–
Texas Tribune	Aug 29–Sep 15, 2019	550	± 4.2%	26%	1%	4%	3%	5%	1%	14%	12%	18%	3%	4%[ri]	6%
Quinnipiac University	Sep 4–9, 2019	456	± 5.5%	28%	1%	3%	3%	5%	2%	12%	12%	18%	1	1%[rj]	12%
Univision/UH	Aug 31– Sep 6, 2019	1004 (RV)	± 4.5%	20%	3%	1%	12%	5%	–	19%	13%	12%	1%	4%[rk]	10%
Ragnar Research Archived 2019-09-11 at the Wayback Machine	Sep 3–5, 2019	600	± 3.9%	23%	1%	6%	2%	7%	–	12%	12%	15%	–[rl]	7%[rm]	18%
Climate Nexus	Aug 20–25, 2019	639	–	24%	2%	3%	3%	7%	–	21%	12%	12%	1%	5%[rn]	9%
TEXAS LYCEUM	Aug 16–25, 2019	358	± 5.2%	24%	2%	3%	4%	4%	3%	18%	13%	15%	2%	8%[ro]	2%
Emerson College	Aug 1–3, 2019	400	± 4.9%	28%	2%	7%	2%	5%	<1%	19%	16%	14%	3%	5%[rp]	–
YouGov/CBS News	Jul 9–18, 2019	910	± 4.2%	27%	0%	4%	4%	12%	1%	17%	12%	16%	1%	6%[rq]	–
YouGov/University of Texas	May 31 – Jun 9, 2019	483	± 5.0%	23%	1%	8%	3%	5%	1%	15%	12%	14%	0%	8%[rr]	7%
Quinnipiac University	May 29 – Jun 4, 2019	407	± 5.8%	30%	1%	3%	4%	4%	<1%	16%	15%	11%	1%	5%[rs]	8%
Change Research	May 30 – Jun 3, 2019	1,218	± 2.8%	24%	1%	8%	2%	8%	1%	27%	13%	12%	1%	2%[rt]	–
Emerson College Archived 2019-07-03 at the Wayback Machine	Apr 25–28, 2019	342	± 5.3%	23%	1%	8%	4%	3%	3%	22%	17%	7%	3%	11%[ru]	–
	Apr 25, 2019	Biden announces his candidacy
Change Research	Apr 18–22, 2019	1,578	± 2.5%	20%	2%	15%	4%	5%	1%	25%	19%	5%	1%	2%[rv]	–
				–	4%	21%	5%	8%	1%	33%	23%	5%	0%	0%[rw]	–

Utah primary[edit]

The Utah Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Joe Biden	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	Feb 22–March 2, 2020	26.3%	21.7%	18.7%	13.3%	1.5%	20.0%
FiveThirtyEight	March 3, 2020	Until March 2, 2020[d]	26.3%	20.0%	18.2%	14.6%	1.3%	20.9%
Average			26.3%	20.9%	18.5%	14.0%	1.4%	20.5%
Utah primary results (March 3, 2020)			36.1%	18.4%	15.4%	16.2%	0.8%	13.0%

Tabulation of individual polls of the 2020 Utah Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	143 (LV)	± 9.0%	27%	29%	7%	6%	22%	6%	–	2%[rx]	–
Data for Progress	Feb 28–Mar 2, 2020	622 (LV)	± 3.9%	23%	17%	7%	3%	29%	19%	–	2%[ry]	–
	Mar 1, 2020	Buttigieg withdraws from the race
HarrisX/University of Utah/Deseret News	Feb 22–26, 2020	298 (LV)	± 5.7%	6%	19%	18%	4%	28%	15%	–	1%[rz]	8%
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race
Salt Lake Tribune/Suffolk	Jan 18–22, 2020	132 (LV)	± 8.5%	12%	10%	5%	3%	27%	14%	5%	4%[sa]	21%

Vermont primary[edit]

The Vermont Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Bernie Sanders	Elizabeth Warren	Joe Biden	Michael Bloomberg	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 3, 2020	February 4–March 2, 2020	52.0%	14.0%	10.7%	10.3%	1.0%	12.0%
RealClear Politics	March 3, 2020	Insufficient recent polling to supply an average.
FiveThirtyEight	March 3, 2020	until March 2, 2020[d]	53.0%	14.2%	10.4%	8.9%	0.9%	12.6%
Average			52.5%	14.1%	10.55%	9.6%	0.95%	12.3%
Vermont primary results (March 3, 2020)			50.6%	12.5%	21.9%	9.4%	0.8%	4.8%

Tabulation of individual polls of the 2020 Vermont Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Un- decided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	147 (LV)	± 11.0%	11%	16%	5%	2%	48%	17%	2%[sb]	–
Data for Progress	Feb 28–Mar 2, 2020	236 (LV)	± 6.9%	16%	8%	1%	–	57%	16%	2%[sc]	–
	Mar 1, 2020	Buttigieg withdraws from the race
Vermont Public Radio	Feb 4–10, 2020	332 (LV)	± 4.0%	5%	7%	9%	4%	51%	13%	2%[sd]	7%

Virginia primary[edit]

The Virginia Democratic primary was held on March 3, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates Polled	Joe Biden	Bernie Sanders	Michael Bloomberg	Elizabeth Warren	Tulsi Gabbard	Un- decided[a]
270 to Win	March 3, 2020	Until March 3, 2020	28.8%	20.0%	17.3%	10.3%	0.7%	23.9%[se]
RealClear Politics	March 3, 2020	Until March 3, 2020	44.0%	24.5%	14.0%	15.0%	0.0%	2.5%
FiveThirtyEight	Mar 3, 2020	until Mar 3, 2020 [d]	39.9%	21.0%	13.2%	12.3%	0.5%	13.1%
Average			37.6%	21.8%	14.1%	12.5%	0.4%	13.2%
Virginia primary results (March 3, 2020)			53.3%	23.1%	9.7%	10.8%	0.9%	2.2%

Tabulation of individual polls of the 2020 Virginia Democratic Primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Un- decided
	Mar 2, 2020	Klobuchar withdraws from the race
Swayable Archived 2020-03-03 at the Wayback Machine	Mar 1–2, 2020	1,435 (LV)	± 4.0%	36%	20%	–	4%	–	3%	–	20%	11%	6%[sf]	–
AtlasIntel	Mar 1–2, 2020	545 (LV)	± 4.0%	42%	11%	–	1%	–	1%	–	28%	10%	3%[sg]	4%
Change Research	Mar 1–2, 2020	510 (LV)	–	45%	10%	–	–	–	4%	–	25%	13%	3%[sh]	–
Data for Progress	Feb 28–Mar 2, 2020	327 (LV)	± 5.4%	39%	18%	–	–	–	–	–	24%	17%	1%[si]	–
	Mar 1, 2020	Buttigieg withdraws from the race
Data for Progress	Feb 23 – 25, 2020	499 (LV)	± 4.5%	19%	17%	–	12%	–	5%	–	28%	17%	2%[sj]	–
Monmouth University	Feb 13 – 16, 2020	400 (LV)	± 4.9%	18%	22%	–	11%	–	9%	–	22%	5%	1%[sk]	11%
				51%[sl]	–	–	–	–	–	–	38%	–	4%[sm]	7%
				–	47%[sn]	–	–	–	–	–	41%	–	5%[so]	7%
				–	–	–	42%[sp]	–	–	–	44%	–	7%[sq]	7%
				–	–	–	–	–	42%[sr]	–	45%	–	6%[ss]	7%
Christopher Newport University	Feb 3 – 23, 2020	561 (LV)	± 4.3%	22%	13%	–	8%	–	5%	–	17%	8%	6%[st]	16%[su]
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
University of Mary Washington	Sep 3 – 15, 2019	882 (RV)	± 3.3%	23%	–	1%	4%	5%	2%	1%	9%	9%	46%[sv]	–
Hampton University	May 29 – Jun 6, 2019	1,126 (RV)	± 4.3%	36%	–	2%	11%	7%	<1%	3%	17%	13%	10%[sw]	–
Change Research	Apr 26–30, 2019	551 (LV)	± 4.2%	41%	–	3%	12%	5%	1%	4%	20%	10%	5%[sx]	–

Idaho primary[edit]

The Idaho Democratic primary is scheduled to take place on March 10, 2020.^[18]

Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Tulsi Gabbard	Bernie Sanders	Other	Undecided
Swayable Archived 2020-03-18 at the Wayback Machine	Mar 8–9, 2020	833 (LV)	± 7%	52%	2%	37%	9%	–
Data for Progress	Mar 7–9, 2020	329 (LV)	± 5.4%	51%	2%	47%	–	–

Michigan primary[edit]

The Michigan Democratic primary is scheduled to take place on March 10, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided[sy]
270 to Win	Mar 10, 2020	Mar 4–9, 2020	57.0%	32.3%	1.3%	9.4%
RealClear Politics	Mar 10, 2020	Mar 4–9, 2020	55.7%	33.3%	1.3%	9.7%
FiveThirtyEight	Mar 10, 2020	until Mar 9, 2020[sz]	55.3%	31.9%	1.2%	11.6%
Average			56.0%	32.5%	1.3%	10.2%
Michigan primary results (March 10, 2020)			52.9%	36.4%	0.6%	10.1%

Tabulation of individual polls of the 2020 Michigan Democratic primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Swayable Archived 2020-03-18 at the Wayback Machine	Mar 9, 2020	3,126 (LV)	± 3.0%	62%	–	–	–	–	–	–	28%	–	–	10%[ta]	–
AtlasIntel	Mar 7–9, 2020	528 (LV)	± 4.0%	48%	3%	–	–	–	–	–	40%	1%	–	3%[tb]	5%
Data for Progress	Mar 7–9, 2020	320 (LV)	± 5.5%	59%	–	–	–	–	–	–	38%	–	–	2%[tc]	–
Mitchell Research & Communications	Mar 8, 2020	602 (LV)	± 4.0%	54%	1%	–	1%	–	1%	–	33%	3%	–	3%[td]	5%
Target Insyght	Mar 8, 2020	600 (LV)	± 4.0%	65%	2%	–	–	–	1%	–	24%	3%	–	3%[te]	1%
Concord Public Opinion Partners/ The Welcome Party	Mar 7–8, 2020	305 (LV)	–	54%	–	–	–	–	–	–	23%	–	–	1%[tf]	22%
YouGov/Yahoo News	Mar 6–8, 2020	–(RV)[tg]	± 5.8%	54%	–	–	–	–	–	–	42%	–	–	–	–
Monmouth University	Mar 5–8, 2020	411 (LV)	± 4.8%	51%	3%	–	<1%	–	<1%	–	36%	1%	–	7%[th]	2%
ROI Rocket	Mar 4–8, 2020	1,000 (LV)	± 3.1%	55%	–	–	–	–	–	–	45%	–	–	–	–
The Progress Campaign (D)[12]	Mar 3–7, 2020	417 (RV)	± 4.7%	51%	–	–	–	–	–	–	44%	–	–	1%	4%[ti]
EPIC-MRA/Detroit Free Press	Mar 4–6, 2020	400 (LV)	± 4.9%	51%	–	–	–	–	–	–	27%	–	–	9%[tj]	13%[tk]
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
GlenGariff Group Inc./Detroit News/WDIV-TV	Feb 28 – Mar 2, 2020	600 (LV)	± 4.0%	29%	11%	–	6%	–	3%	–	23%	7%	–	6%[tl]	16%
	Feb 29, 2020	South Carolina primary; Steyer withdraws from the race after close of polls
YouGov/University of Wisconsin-Madison	Feb 11–20, 2020	662 (LV)	–	16%	13%	–	11%	–	8%	–	25%	13%	–	–	14%[tm]
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
Baldwin Wallace University/Oakland University/Ohio Northern University	Jan 8–20, 2020	477 (RV)	–	27%	9.1%	–	6.3%	–	1.9%	–	21.6%	13.6%	3.5%	5.3%[tn]	10.6%
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
Emerson College	Oct 31 – Nov 3, 2019	454	± 4.6%	34%	–	3%	8%	3%	0%	–	28%	19%	2%	3%[to]	–
	Nov 1, 2019	O'Rourke withdraws from the race
Siena Research/New York Times	Oct 13–26, 2019	203	–	30%	–	0%	3%	0%	1%	0%	17%	21%	1%	1%[tp]	23%
Kaiser Family Foundation	Sep 23 – Oct 15, 2019	208 (LV)	–	19%	–	1%	7%	2%	1%	1%	15%	25%	1%	0%[tq]	27%
Denno Research	Sep 21–24, 2019	217	–	27%	–	1%	4%	4%	1%	1%	12%	23%	1%	4%[tr]	23%[ts]
Climate Nexus	Jul 14–17, 2019	324 (LV)	–	35%	–	2%	4%	8%	1%	1%	16%	14%	1%	2%[tt]	13%[tu]
Zogby Analytics	May 23–29, 2019	268	± 6.0%	27%	–	1%	9%	7%	1%	4%	18%	8%	2%	5%[tv]	–
Denno Research Archived 2019-05-29 at the Wayback Machine	May 8–10, 2019	235	–	37%	–	3%	5%	4%	1%	1%	16%	9%	0%	4%[tw]	23%
	Apr 25, 2019	Biden announces his candidacy
	Apr 14, 2019	Buttigieg announces his candidacy
	Mar 14, 2019	O'Rourke announces his candidacy
Emerson College Archived 2019-03-10 at the Wayback Machine	Mar 7–10, 2019	317	± 5.5%	40%	–	3%	0%	12%	5%	2%	23%	11%	–	4%[tx]	–

Mississippi primary[edit]

The Mississippi Democratic primary is scheduled to take place on March 10, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided[a]
270toWin	March 10, 2020	March 4–9, 2020	72.5%	25.0%	0.5%	2.0%
FiveThirtyEight	March 10, 2020	until March 9, 2020[d]	70.7%	23.4%	0.4%	5.5%
Average			71.6%	24.2%	0.5%	3.7%
Mississippi primary results (March 10, 2020)			81.1%	14.8%	0.4%	3.7%

Tabulation of individual polls of the 2020 Mississippi Democratic primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Cory Booker	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Other	Undecided
Swayable Archived 2020-03-18 at the Wayback Machine	Mar 8–9, 2020	1,247 (LV)	± 4.0%	68%	–	–	–	28%	–	4%[ty]	–
Data for Progress	Mar 4–7, 2020	340 (LV)	± 5.1%	77%	–	–	–	22%	–	1%[tz]	–
	Mar 5, 2020	Warren withdraws from the race
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
	Jan 13, 2020	Booker withdraws from the race
	Dec 3, 2019	Harris withdraws from the race
NBC News/SurveyMonkey	Jul 2–16, 2019	282 (RV)	± 4.2%	47%	3%	3%	8%	21%	7%	5%[ua]	3%
Chism Strategies/Millsaps College	Jun 20–21, 2019	523 (LV)	± 4.3%	50%	2%	2%	5%	7%	7%	6%[ub]	21%

Missouri primary[edit]

The Missouri Democratic primary is scheduled to take place on March 10, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	March 10, 2020	March 4–9, 2020	57.6%	34.4%	2.7%	5.3%
RealClear Politics	March 10, 2020	March 4–9, 2020	61.0%	30.7%	2.5%	5.8%
FiveThirtyEight	March 10, 2020	until March 9, 2020[d]	60.3%	32.6%	2.5%	4.6%
Average			59.6%	32.6%	2.6%	5.2%
Missouri primary results (March 10, 2020)			60.1%	34.6%	0.7%	4.6%

Tabulation of individual polls of the 2020 Missouri Democratic primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Other	Undecided
Swayable Archived 2020-03-18 at the Wayback Machine	Mar 9, 2020	2,037 (LV)	± 3.0%	57%	–	–	–	–	–	36%	–	8%[uc]	–
Øptimus	Mar 7–9, 2020	402 (LV)	± 5.4%	68%	–	–	–	–	–	29%	–	3%[ud]	–
Data for Progress	Mar 4–7, 2020	348 (LV)	± 5.3%	62%	–	–	–	–	–	32%	4%	2%[ue]	–
	Mar 5, 2020	Warren withdraws from the race
Remington Research Group/Missouri Scout	Mar 4–5, 2020	1,040 (LV)	± 3.0%	53%	–	–	–	–	–	31%	–	10%[uf]	6%
Emerson Polling/Nexstar	Mar 4–5, 2020	425 (LV)	± 4.7%	48%	–	–	–	–	–	44%	–	8%[ug]	<6%
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
The Progress Campaign (D)[13]	Feb 16–23, 2020	294 (RV)	± 5.1%	29%	14%	13%	–	4%	–	23%	12%	4%[uh]	–
Americana Analytics Archived February 26, 2020, at the Wayback Machine	Feb 20–21, 2020	1,198 (LV)	± 2.83%	22%	17%	11%	–	9%	–	11%	10%	1%[ui]	17%
Remington Research Group	Jan 22–23, 2020	1,460 (LV)	–	39%	14%	6%	–	8%	–	7%	9%	3%[uj]	14%
	Dec 3, 2019	Harris withdraws from the race
	Nov 1, 2019	O'Rourke withdraws from the race
Show Me Victories	Sept 13–16, 2019	400	± 5%	34%	–	10%	9%	1%	4%	14%	22%	8%[uk]	–
Remington Research Group	Jul 10–11, 2019	1,122	–	43%	–	5%	13%	–	1%	4%	15%	–	19%

North Dakota caucus[edit]

The North Dakota Democratic caucus is scheduled to take place on March 10, 2020.^[18]

Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Tulsi Gabbard	Bernie Sanders	Other	Undecided
Swayable Archived 2020-03-18 at the Wayback Machine	Mar 7–9, 2020	383 (LV)	± 9%	65%	0%	31%	4%	–

Washington primary[edit]

The Washington Democratic primary is scheduled to take place on March 10, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Un- decided[ul]
270 to Win	Mar 10, 2020	Feb 15 – Mar 9, 2020	33.5%	34.0%	1.3%	34.7%
RealClear Politics	Mar 9, 2020	No averages at this time
FiveThirtyEight	Mar 10, 2020	until Mar 9, 2020[d]	39.8%	37.1%	1.4%	21.7%
Average			36.65%	36.55%	1.35%	28.2%

Tabulation of individual polls of the 2020 Washington Democratic primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Jay Inslee	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Swayable Archived March 18, 2020, at the Wayback Machine	Mar 9, 2020	1,840 (LV)	± 3.0%	39%	–	–	–	–	–	37%	–	–	25%[um]	–
Data for Progress	Mar 7–9, 2020	497 (LV)	± 5.1%	49%	–	–	–	–	–	43%	6%	–	2%[un]	–
Survey USA/KING-TV	Mar 4–6, 2020	550 (LV)	± 5.4%	36%	–	–	–	–	–	35%	10%	–	13%[uo]	5%
	Mar 5, 2020	Warren withdraws from the race
Data for Progress	Mar 4–5, 2020	737 (LV)	± 3.6%	47%	–	–	–	–	–	44%	5%[up]	–	3%[uq]	–
	Mar 4, 2020	Bloomberg withdraws from the race
	Mar 2, 2020	Klobuchar withdraws from the race
	Mar 1, 2020	Buttigieg withdraws from the race
Elway Research/Cascade Public Media	Feb 15–18, 2020	404 (LV)	± 5.0%	10%	15%	9%	–	–	11%	21%	11%	0%	2%[ur]	22%
	Feb 11, 2020	Yang withdraws from the race
Survey USA/KING-TV	Jan 26–28, 2020	536 (LV)	± 6.2%	21%	12%	8%	–	–	3%	26%	16%	4%	2%[us]	7%
	Dec 3, 2019	Harris withdraws from the race
	Aug 21, 2019	Inslee withdraws from the race
Zogby Analytics	Jul 22 – Aug 1, 2019	1,265 (LV)	± 2.8%	19%	–	5%	9%	6%	1%	18%	14%	2%	11%[ut]	16%

Arizona primary[edit]

The Arizona Democratic primary is scheduled to take place on March 17, 2020.^[18]

Polling aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	Mar 17, 2020	Mar 3–16, 2020	50.6%	29.4%	1.0%	19.0%
RealClear Politics	Mar 17, 2020	Mar 6–15, 2020	51.7%	33.7%	1.0%	13.6%
FiveThirtyEight	Mar 17, 2020	until Mar 16, 2020[d]	51.6%	26.9%	1.1%	20.4%
Average			51.3%	30.0%	1.0%	17.7%

Tabulation of individual polls of the 2020 Arizona Democratic primary
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Kamala Harris	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Undecided
Swayable Archived March 17, 2020, at the Wayback Machine	Mar 16, 2020	1,167 (LV)	± 5.0%	53%	–	–	–	29%	–	–	19%[uu]	–
Marist/NBC News	Mar 10–15, 2020	523 (LV)	± 6.0%	53%	–	–	–	36%	–	–	8%[uv]	3%
		913 (RV)	± 4.5%	50%	–	–	–	37%	–	–	9%[uw]	5%
Monmouth University	Mar 11–14, 2020	373 (LV)	± 5.1%	51%	5%	3%	–	31%	3%	–	2%[ux]	5%
Latino Decisions/Univision/ Arizona State University	Mar 6–11, 2020	541 (LV)	± 4.2%	57%[uy]	–	–	–	38%[uy]	–	–	–	5%[uy]
				51%	–	–	–	34%	–	–	6%[uz]	8%
	March 4–5, 2020	Bloomberg and Warren withdraw from the race
OH Predictive Insights	Mar 3–4, 2020	398 (LV)	± 4.9%	45%	12%	–	–	17%	13%	–	4%[va]	9%
	March 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
	February 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
	Dec 3, 2019	Harris withdraws from the race
OH Predictive Insights	Oct 31 – Nov 8, 2019	260 (LV)	± 6.1%	29%	–	9%	5%	16%	18%	4%	19%[vb]	–
Emerson Polling	Oct 25–28, 2019	339	± 5.2%	28%	–	12%	4%	21%	21%	5%	7%[vc]	–
Siena Research/New York Times	Oct 13–26, 2019	209	–	24%	–	5%	3%	16%	15%	1%	1%[vd]	31%
Change Research	Sep 27–28, 2019	396 (LV)	–	15%	–	13%	4%	19%	35%	8%	7%[ve]	–
Bendixen&Amandi	Sep 9–12, 2019	250	± 4.3%	29%	–	5%	4%	18%	24%	2%	8%[vf]	10%
Zogby Analytics	May 23–29, 2019	197	± 7.0%	35%	–	6%	4%	16%	10%	0%	11%[vg]	–

Florida primary[edit]

The Florida Democratic primary is scheduled to take place on March 17, 2020.^[18]

Polling Aggregation
Source of poll aggregation	Date updated	Dates polled	Joe Biden	Bernie Sanders	Tulsi Gabbard	Other/ Undecided[a]
270 to Win	Mar 17, 2020	Mar 5–16, 2020	65.5%	23.0%	1.8%	9.7%
RealClear Politics	Mar 17, 2020	Mar 6–12, 2020	64.7%	25.7%	2.0%	7.6%
FiveThirtyEight	Mar 17, 2020	until Mar 16, 2020 [d]	63.8%	24.7%	1.4%	10.1%
Average			64.7%	24.5%	1.7%	9.1%

Polling from February 12, 2020 to March 17, 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Pete Buttigieg	Amy Klobuchar	Bernie Sanders	Elizabeth Warren	Other	Un- decided
Swayable Archived 2020-03-17 at the Wayback Machine	Mar 16, 2020	4,035 (LV)	± 2.0%	64%	–	–	–	25%	–	12%[vh]	–
AtlasIntel	Mar 14–16, 2020	532 (LV)	± 4.0%	67%	–	–	–	27%	–	4%[vi]	2%
Point Blank Political	Mar 11–13, 2020	3,165 (LV)	± 2.3%	61%[uy]	–	–	–	32%[uy]	–	–	7%
				57%	2%	2%	0%	29%	4%	1%[vj]	5%
Emerson College/Nexstar	Mar 11–12, 2020	434 (LV)	± 4.7%	65%	–	–	–	27%	–	2%[vk]	6%
Gravis Marketing	Mar 10–12, 2020	516 (LV)	± 4.3%	66%	–	–	–	25%	–	–	9%
ROI Rocket	Mar 6–12, 2020	877 (LV)	± 3.3%	67%	–	–	–	27%	–	–[vl]	–[vl]
Latino Decisions/Univision	Mar 6–12, 2020	531 (LV)	± 4.3%	67%[uy]	–	–	–	32%[uy]	–	–	2%
				63%	–	–	–	25%	–	8%[vm]	4%
University of North Florida	Mar 5–10, 2020	1,502 (LV)	± 2.5%	66%	2%	1%	<1%	22%	2%	1%[vn]	7%
St Pete Polls/FloridaPolitics.com	Mar 6–8, 2020	2,480 (LV)	± 2.0%	69%	5%	2%	1%	14%	1%	0%[vo]	9%
Point Blank Political	Mar 6–8, 2020	3,376 (LV)	± 2.3%	61%[uy]	–	–	–	32%[uy]	–	–	7%
				55%	2%	2%	1%	29%	4%	2%[vp]	7%
Florida Atlantic University	Mar 5–7, 2020	399 (LV)	± 4.9%	61%	–	–	–	25%	–	3%[vq]	10%
	Mar 4–5, 2020	Bloomberg and Warren withdraw from the race
St Pete Polls/FloridaPolitics.com	Mar 4, 2020	1,882 (LV)	± 2.3%	61%	14%	1%	1%	12%	5%	0%[vr]	6%
	Mar 1–2, 2020	Buttigieg and Klobuchar withdraw from the race
St Pete Polls	Feb 25–26, 2020	2,788 (LV)	± 1.9%	34%	25%	8%	4%	13%	5%	1%[vs]	10%
Saint Leo University	Feb 17–22, 2020	342 (LV)	–	25%	25%	11%	5%	17%	7%	4%[vt]	7%
Florida Southern College	Feb 17–21, 2020	313 (LV)	± 5.54%	22%	23%	9%	5%	18%	12%	1%[vu]	9%
St Pete Polls	Feb 18–19, 2020	2,412 (LV)	± 2.0%	27%	32%	8%	7%	11%	5%	2%[vv]	10%
Tel Opinion Research/Politico/ Let’s Preserve the American Dream	Feb 13–18, 2020	800 (LV)	± 3.46%	20%	26%	8%	5%	13%	7%	5%[vw]	16%
St Pete Polls	Feb 12–13, 2020	3,047 (LV)	± 1.8%	26%	27%	11%	9%	10%	5%	1%[vx]	11%

Polling before February 11, 2020
Poll source	Date(s) administered	Sample size[g]	Margin of error	Joe Biden	Michael Bloomberg	Cory Booker	Pete Buttigieg	Kamala Harris	Amy Klobuchar	Beto O'Rourke	Bernie Sanders	Elizabeth Warren	Andrew Yang	Other	Un- decided
	Feb 11, 2020	New Hampshire primary; Yang withdraws from the race after close of polls
St. Pete Polls	Jan 27–28, 2020	2,590 (LV)	± 1.9%	41%	17%	–	6%	–	5%	–	9%	7%	2%	2%[vy]	10%
Tel Opinion Research/Let’s Preserve the American Dream/Politico	Jan 21–23, 2020	600 (LV)	± 4%	41%[vz]	–	–	–	–	–	–	21%	18%	–	–	20%
				29%	4%	–	4%	–	4%	–	17%	12%	2%	2%[wa]	28%
	Jan 13, 2020	Booker withdraws from the race
Florida Atlantic University	Jan 9–12, 2020	494	± 4.4%	42%	7%	3%	3%	–	6%	–	16%	10%	5%	5%[wb]	4%[wc]
	Dec 3, 2019	Harris withdraws from the race
	Nov 24, 2019	Bloomberg announces his candidacy
	Nov 1, 2019	O'Rourke withdraws from the race
Siena College/New York Times	Oct 13–26, 2019	650 (RV)	± 4.4%	27%	–	0%	5%	1%	2%	0%	13%	19%	0%	1%[wd]	29%
Tel Opinion Research	Sep 15–18, 2019	800 (LV)	± 3.54%	43%	–	–	–	–	–	–	10%	26%	–	–	18%
				37%	–	–	5%	6%	–	–	9%	18%	2%	–	20%
				24%	–	–	2%	3%	–	–	5%	11%	1%	3%[we]	49%
Florida Atlantic University	Sep 12–15, 2019	407	± 4.9%	34%	–	1%	5%	4%	0%	2%	14%	24%	2%	8%[wf]	6%
St. Pete Polls	Jun 22–23, 2019	2,022	± 2.2%	47%	–	3%	8%	6%	–	2%	8%	12%	–	7%	6%
Change Research	Jun 16–17, 2019	1,130	± 2.9%	33%	–	2%	15%	7%	2%	3%	20%	15%	3%	2%[wg]	–
Quinnipiac University	Jun 12–17, 2019	417	± 5.8%	41%	–	1%	8%	6%	1%	1%	14%	12%	<1%	1%[wh]	12%
Climate Nexus Archived 2019-06-25 at the Wayback Machine	Jun 7–11, 2019	676	± 2.6%	32%	–	2%	6%	6%	1%	2%	16%	10%	2%	9%[wi]	14%