| Betting Odds | Date | Sanders | Biden | Bloomberg | Warren | Buttigieg | Clinton | Yang | Klobuchar | Obama | Gabbard | Patrick | Steyer | Bennet | Spread |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| RCP Average | 1/31 | 38.0 | 34.3 | 15.7 | 8.4 | 5.7 | 4.8 | 4.2 | 2.2 | 1.1 | 0.8 | 0.8 | 0.8 | 0.3 | Sanders +3.7 |
| 32Red | February 1st | 42 | 33 | 15 | 7 | 4 | 7 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | Sanders +8.3 |
| Smarkets | February 1st | 37 | 32 | 14 | 6 | 4 | 4 | 3 | 2 | 1 | 0 | 1 | 0 | Sanders +5.6 | |
| BetVictor | February 1st | 35 | 38 | 17 | 13 | 5 | 5 | 4 | 2 | 1 | 1 | Biden +3.3 | |||
| Betfair | February 1st | 38 | 33 | 14 | 8 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | Sanders +4.7 |
| SpreadEx | February 1st | 40 | 35 | 18 | 9 | 6 | 5 | 4 | 3 | 1 | 1 | 0 | 0 | Sanders +5.2 | |
| BetOnline | February 1st | 36 | 33 | 14 | 9 | 9 | 5 | 7 | 2 | 1 | 1 | 1 | 1 | Sanders +3.0 | |
| BookMaker | February 1st | 37 | 35 | 16 | 9 | 5 | 3 | 3 | 2 | 1 | 0 | Sanders +2.3 | |||
| Bovada | January 31st | 38 | 35 | 17 | 6 | 7 | 5 | 5 | 2 | 1 | 1 | 0 | 1 | 0 | |
| 32Red | January 31st | 42 | 33 | 14 | 7 | 4 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | 0 | |
| Smarkets | January 31st | 38 | 32 | 14 | 6 | 4 | 4 | 3 | 2 | 1 | 0 | 0 | 0 | ||
| SpreadEx | January 31st | 42 | 35 | 17 | 8 | 5 | 6 | 3 | 3 | 1 | 1 | 1 | 0 | ||
| BetVictor | January 31st | 35 | 38 | 17 | 13 | 5 | 5 | 4 | 2 | 1 | 1 | ||||
| BetOnline | January 31st | 36 | 33 | 14 | 9 | 9 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | ||
| Betfair | January 31st | 38 | 33 | 14 | 8 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | |
| BookMaker | January 31st | 37 | 35 | 16 | 9 | 5 | 4 | 3 | 2 | 1 | 0 | ||||
| Bovada | January 30th | 38 | 35 | 17 | 6 | 7 | 5 | 5 | 2 | 1 | 1 | 0 | 1 | 0 | |
| 32Red | January 30th | 40 | 33 | 14 | 7 | 4 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | 0 | |
| Smarkets | January 30th | 37 | 32 | 14 | 6 | 4 | 4 | 3 | 2 | 1 | 0 | 1 | 0 | ||
| BetVictor | January 30th | 35 | 38 | 17 | 13 | 5 | 5 | 4 | 2 | 1 | 1 | ||||
| Betfair | January 30th | 38 | 33 | 14 | 8 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | |
| SpreadEx | January 30th | 40 | 35 | 18 | 8 | 5 | 5 | 3 | 2 | 1 | 1 | 0 | 0 | ||
| BetOnline | January 30th | 36 | 33 | 14 | 9 | 9 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | ||
| BookMaker | January 30th | 37 | 35 | 16 | 9 | 6 | 3 | 4 | 2 | 1 | 0 | ||||
| Bovada | January 29th | 38 | 35 | 17 | 6 | 7 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | 0 | |
| 32Red | January 29th | 38 | 36 | 13 | 8 | 5 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | 0 | |
| BetVictor | January 29th | 35 | 36 | 13 | 13 | 8 | 7 | 5 | 2 | 1 | 1 | ||||
| Smarkets | January 29th | 38 | 34 | 15 | 6 | 3 | 3 | 2 | 1 | 1 | 0 | 0 | 0 | ||
| SpreadEx | January 29th | 40 | 36 | 19 | 8 | 4 | 5 | 3 | 2 | 1 | 1 | 0 | 0 | ||
| Betfair | January 29th | 38 | 33 | 14 | 8 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | |
| Bovada | January 29th | 38 | 35 | 17 | 6 | 7 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | 0 | |
| BetOnline | January 29th | 40 | 34 | 13 | 13 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | ||
| BookMaker | January 29th | 38 | 35 | 15 | 10 | 7 | 3 | 4 | 2 | 1 | 1 | ||||
| 32Red | January 28th | 36 | 33 | 13 | 8 | 5 | 5 | 3 | 2 | 1 | 1 | 1 | 1 | 0 | |
| Smarkets | January 28th | 37 | 33 | 13 | 5 | 4 | 3 | 3 | 2 | 1 | 0 | 0 | 0 | ||
| SpreadEx | January 28th | 40 | 36 | 17 | 8 | 5 | 5 | 3 | 2 | 1 | 1 | 0 | 0 | ||
| Betfair | January 28th | 38 | 33 | 14 | 8 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | |
| Bovada | January 28th | 38 | 37 | 13 | 10 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 2 | 0 | |
| BetOnline | January 28th | 40 | 34 | 13 | 13 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | ||
| BookMaker | January 28th | 37 | 35 | 15 | 10 | 7 | 3 | 4 | 2 | 1 | 1 | ||||
| 32Red | January 27th | 36 | 32 | 12 | 10 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 2 | 0 | |
| Smarkets | January 27th | 37 | 33 | 12 | 7 | 5 | 3 | 3 | 1 | 1 | 0 | 0 | 0 | ||
| SpreadEx | January 27th | 40 | 36 | 17 | 11 | 7 | 5 | 3 | 1 | 1 | 1 | 0 | 0 | ||
| Betfair | January 27th | 38 | 33 | 13 | 13 | 9 | 6 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | |
| BetOnline | January 27th | 40 | 34 | 13 | 13 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | ||
| BookMaker | January 27th | 37 | 36 | 15 | 11 | 7 | 3 | 4 | 2 | 1 | 1 | ||||
| Bovada | January 26th | 38 | 37 | 13 | 10 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 2 | 0 | |
| 32Red | January 26th | 36 | 32 | 12 | 10 | 6 | 5 | 4 | 2 | 1 | 1 | 1 | 2 | 0 | |
| SpreadEx | January 26th | 40 | 33 | 17 | 12 | 8 | 4 | 2 | 2 | 1 | 1 | 0 | 0 | ||
| Smarkets | January 26th | 37 | 31 | 12 | 8 | 6 | 3 | 2 | 1 | 1 | 0 | 0 | 0 | ||
| Betfair | January 26th | 38 | 33 | 13 | 13 | 9 | 6 | 4 | 2 | 1 | 1 | 1 | 1 | 0 | |
| Bovada | January 26th | 38 | 37 | 11 | 10 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 2 | 0 | |
| BetOnline | January 26th | 40 | 34 | 13 | 13 | 8 | 5 | 5 | 2 | 1 | 1 | 1 | 1 | ||
| BookMaker | January 26th | 37 | 35 | 14 | 11 | 6 | 2 | 4 | 2 | 1 | 1 | ||||
| BetVictor | January 25th | 35 | 36 | 13 | 13 | 8 | 7 | 5 | 2 | 1 | 1 |
38.0 Sanders +3.7 | 34.3 Biden | 15.7 Bloomberg | 8.4 Warren |
5.7 Buttigieg | 4.8 Clinton | 4.2 Yang | 2.2 Klobuchar |
1.1 Obama | 0.8 Gabbard | 0.8 Patrick | 0.8 Steyer |
0.4 Bennet | 0.3 Booker | 0.2 Cuomo | 0.1 Castro |