| Poll | Date | Biden | Sanders | Harris | Buttigieg | Warren | O'Rourke | Booker | Klobuchar | Yang | Castro | Hickenlooper | Spread | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RCP Average | 4/5 - 4/21 | 29.3 | 23.0 | 8.3 | 7.5 | 6.5 | 6.3 | 3.5 | 1.5 | 1.5 | 1.3 | 1.0 | 0.8 | Biden +6.3 |
| MonmouthMonmouth | 4/11 - 4/15 | 27 | 20 | 8 | 8 | 6 | 4 | 2 | 1 | 0 | 0 | 2 | 0 | Biden +7 |
| Morning ConsultM. Consult | 4/15 - 4/21 | 30 | 24 | 8 | 9 | 7 | 6 | 4 | 2 | 2 | 1 | 1 | 1 | Biden +6 |
| EmersonEmerson | 4/11 - 4/14 | 24 | 29 | 8 | 9 | 7 | 8 | 2 | 1 | 3 | 3 | 0 | 0 | Sanders +5 |
| The Hill/HarrisXThe Hill | 4/5 - 4/6 | 36 | 19 | 9 | 4 | 6 | 7 | 6 | 2 | 1 | 1 | -- | 2 | Biden +17 |

29.3 Biden +6.3 | 23.0 Sanders | 8.3 Harris | 7.5 Buttigieg |
6.5 Warren | 6.3 O'Rourke | 3.5 Booker | 1.5 Klobuchar |
1.5 Yang | 1.3 Castro | 1.0 Hickenlooper | 0.8 Gillibrand |
0.7 Ryan | 0.5 Gabbard | 0.3 Inslee | 0.3 Delaney |
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| Poll | Date | Biden | Sanders | Harris | Buttigieg | Warren | O'Rourke | Booker | Klobuchar | Yang | Castro | Hickenlooper | Spread | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RCP Average | 4/5 - 4/21 | 29.3 | 23.0 | 8.3 | 7.5 | 6.5 | 6.3 | 3.5 | 1.5 | 1.5 | 1.3 | 1.0 | 0.8 | Biden +6.3 |
| MonmouthMonmouth | 4/11 - 4/15 | 27 | 20 | 8 | 8 | 6 | 4 | 2 | 1 | 0 | 0 | 2 | 0 | Biden +7 |
| Morning ConsultM. Consult | 4/15 - 4/21 | 30 | 24 | 8 | 9 | 7 | 6 | 4 | 2 | 2 | 1 | 1 | 1 | Biden +6 |
| EmersonEmerson | 4/11 - 4/14 | 24 | 29 | 8 | 9 | 7 | 8 | 2 | 1 | 3 | 3 | 0 | 0 | Sanders +5 |
| Morning ConsultM. Consult | 4/8 - 4/14 | 31 | 23 | 9 | 7 | 7 | 8 | 4 | 2 | 1 | 1 | 1 | 1 | Biden +8 |
| Morning ConsultM. Consult | 4/1 - 4/7 | 32 | 23 | 9 | 5 | 7 | 8 | 4 | 2 | 1 | 1 | 1 | 2 | Biden +9 |
| The Hill/HarrisXThe Hill | 4/5 - 4/6 | 36 | 19 | 9 | 4 | 6 | 7 | 6 | 2 | 1 | 1 | -- | 2 | Biden +17 |
| Morning ConsultM. Consult | 3/25 - 3/31 | 33 | 25 | 8 | 3 | 7 | 8 | 4 | 2 | -- | 1 | 1 | 1 | Biden +8 |
| QuinnipiacQuinnipiac | 3/21 - 3/25 | 29 | 19 | 8 | 4 | 4 | 12 | 2 | 2 | 0 | 1 | 1 | 0 | Biden +10 |
| Harvard-HarrisHarris | 3/25 - 3/26 | 35 | 17 | 5 | 2 | 6 | 7 | 4 | 2 | 1 | 1 | 1 | 1 | Biden +18 |
| Harvard-HarrisHarris | 3/25 - 3/26 | 26 | 18 | 11 | 2 | 5 | 5 | 3 | 1 | 2 | 1 | 0 | 0 | Biden +8 |
| Morning ConsultM. Consult | 3/18 - 3/24 | 35 | 25 | 8 | 2 | 7 | 8 | 4 | 2 | -- | 1 | 1 | 1 | Biden +10 |
| FOX NewsFOX News | 3/17 - 3/20 | 31 | 23 | 8 | 1 | 4 | 8 | 4 | 1 | 1 | 1 | 0 | 2 | Biden +8 |
| EmersonEmerson | 3/17 - 3/18 | 26 | 26 | 12 | 3 | 8 | 11 | 3 | 1 | 1 | 1 | 1 | 0 | Tie |
| CNNCNN | 3/14 - 3/17 | 28 | 20 | 12 | 1 | 6 | 11 | 3 | 3 | -- | 1 | 1 | 1 | Biden +8 |
| Morning ConsultM. Consult | 3/11 - 3/17 | 35 | 27 | 8 | 1 | 7 | 8 | 4 | 2 | -- | 1 | 1 | 1 | Biden +8 |
| Morning ConsultM. Consult | 3/4 - 3/10 | 31 | 27 | 10 | 1 | 7 | 7 | 4 | 3 | -- | 1 | 1 | 1 | Biden +4 |
| MonmouthMonmouth | 3/1 - 3/4 | 28 | 25 | 10 | 0 | 8 | 6 | 5 | 3 | 1 | 1 | 1 | 0 | Biden +3 |
| Morning ConsultM. Consult | 2/25 - 3/3 | 31 | 27 | 11 | 1 | 7 | 6 | 4 | 3 | -- | 1 | 1 | 1 | Biden +4 |
| Harvard-HarrisHarris | 2/19 - 2/20 | 37 | 22 | 10 | -- | 4 | 6 | 2 | -- | -- | 2 | -- | 1 | Biden +15 |
| Harvard-HarrisHarris | 2/19 - 2/20 | 30 | 19 | 10 | -- | 4 | 4 | 5 | -- | -- | 0 | -- | 0 | Biden +11 |
| Morning ConsultM. Consult | 2/18 - 2/24 | 29 | 27 | 10 | 1 | 7 | 7 | 4 | 3 | -- | 1 | 1 | 1 | Biden +2 |
| Morning ConsultM. Consult | 2/11 - 2/17 | 30 | 21 | 11 | 0 | 8 | 7 | 5 | 4 | -- | 1 | 1 | 1 | Biden +9 |
| EmersonEmerson | 2/14 - 2/16 | 27 | 17 | 15 | 0 | 9 | 4 | 9 | 5 | -- | 1 | -- | 1 | Biden +10 |
| Morning ConsultM. Consult | 2/4 - 2/10 | 29 | 22 | 13 | -- | 8 | 7 | 5 | 3 | -- | 1 | -- | 1 | Biden +7 |
| MonmouthMonmouth | 1/25 - 1/27 | 29 | 16 | 11 | 0 | 8 | 7 | 4 | 2 | -- | 1 | 1 | 1 | Biden +13 |
| Politico/Morning ConsultPolitico | 1/25 - 1/27 | 33 | 15 | 10 | -- | 6 | 6 | 3 | 1 | -- | 1 | -- | 1 | Biden +18 |
| Politico/Morning ConsultPolitico | 1/18 - 1/22 | 26 | 16 | 9 | -- | 6 | 6 | 4 | 2 | -- | 2 | -- | 2 | Biden +10 |
| Emerson*Emerson* | 1/20 - 1/21 | 45 | 5 | 3 | -- | 3 | 3 | 8 | 1 | -- | 8 | -- | 1 | Biden +37 |
| Harvard-HarrisHarris | 1/15 - 1/16 | 23 | 21 | 7 | -- | 4 | 8 | 3 | -- | -- | 1 | -- | 2 | Biden +2 |
| Harvard-HarrisHarris | 1/15 - 1/16 | 24 | 13 | 4 | -- | 5 | 9 | 2 | -- | -- | 2 | -- | 1 | Biden +11 |
| Politico/Morning ConsultPolitico | 1/11 - 1/14 | 32 | 15 | 6 | -- | 9 | 8 | 2 | 1 | -- | 0 | -- | 1 | Biden +17 |
| Politico/Morning ConsultPolitico | 1/4 - 1/6 | 27 | 16 | 3 | -- | 4 | 7 | 3 | 2 | -- | 0 | -- | 1 | Biden +11 |
| Politico/Morning ConsultPolitico | 12/14 - 12/16 | 25 | 15 | 3 | -- | 3 | 8 | 3 | 1 | -- | 1 | -- | 1 | Biden +10 |
| CNNCNN | 12/6 - 12/9 | 30 | 14 | 4 | -- | 3 | 9 | 5 | -- | -- | -- | -- | -- | Biden +16 |
| EmersonEmerson | 12/6 - 12/9 | 26 | 22 | 9 | -- | 7 | -- | -- | -- | -- | -- | -- | -- | Biden +4 |
| Harvard-HarrisHarris | 11/25 - 11/26 | 28 | 21 | 3 | -- | 5 | 7 | 4 | -- | -- | -- | -- | -- | Biden +7 |
| Harvard-HarrisHarris | 11/25 - 11/26 | 25 | 15 | 2 | -- | 4 | 9 | 3 | -- | -- | -- | -- | -- | Biden +10 |
| Politico/Morning ConsultPolitico | 11/7 - 11/9 | 26 | 19 | 4 | -- | 5 | 8 | 3 | 1 | -- | 1 | -- | 1 | Biden +7 |
| CNNCNN | 10/4 - 10/7 | 33 | 13 | 9 | -- | 8 | 4 | 5 | 1 | -- | -- | -- | 1 | Biden +20 |