2012 Presidential Election State Polls – Missouri
| Poll | Sample | Date | Romney | Obama | Margin |
| 2012 Final Results | 11/6/2012 | 53.9 | 44.3 | +9.6 | |
| Average of Polls | LV Only | Since 10/12/12 | 53.3 | 42.5 | +10.8 |
| Public Policy Polling – D | 835 LV | 11/2-3-12 | 53 | 45 | +8 |
| We Ask America | 1217 LV | 10/30/2012 | 54 | 42 | +12 |
| Survey USA | 589 LV | 10/28-11/3/12 | 50 | 43 | +7 |
| Mason-Dixon/STL Post-Dispatch | 625 LV | 10/23-25/12 | 54 | 41 | +13 |
| Public Policy Polling – D | 582 LV | 10/19-21/12 | 52 | 46 | +6 |
| Rasmussen | 500 LV | 10/17/2012 | 54 | 43 | +11 |
| Wenzel Strategies | 1000 LV | 10/12-13/12 | 55 | 41 | +14 |
| Public Policy Polling – D | 700 LV | 10/1-3/12 | 51 | 45 | +6 |
| Rasmussen | 500 LV | 10/2/2012 | 49 | 46 | +3 |
| We Ask America | 1145 LV | 9/25-27/12 | 48 | 45 | +3 |
| Gravis Marketing | 1959 LV | 9/16-17/12 | 48 | 39 | +9 |
| YouGov | 809 RV | 9/7-14/12 | 49 | 43 | +6 |
| Wenzel Strategies | 850 LV | 9/12/2012 | 57 | 38 | +19 |
| Rasmussen | 500 LV | 9/11/2012 | 48 | 45 | +3 |
| Public Policy Polling – D | 621 LV | 8/28-29/12 | 53 | 41 | +12 |
| Gravis Marketing | 1057 LV | 8/23/2012 | 53 | 36 | +17 |
| Mason-Dixon/STL Post-Dispatch | 625 LV | 8/22-23/12 | 50 | 43 | +7 |
| Rasmussen | 500 LV | 8/22/2012 | 46 | 47 | +1 |
| Public Policy Polling – D | 500 LV | 8/20/2012 | 52 | 42 | +10 |
| Survey USA | 585 LV | 8/9-12/12 | 45 | 44 | +1 |
| Rasmussen | 500 LV | 7/30/2012 | 50 | 44 | +6 |
| STL Post-Dispatch/Mason-Dixon | 625 LV | 7/23-25/12 | 51 | 42 | +9 |
| We Ask America | 1172 LV | 7/24/2012 | 49 | 40 | +9 |
| Rasmussen | 500 LV | 6/7/2012 | 49 | 42 | +7 |
| PPP | 602 RV | 5/24-27/12 | 44 | 45 | +1 |
| Rasmussen | 500 LV | 4/17/2012 | 48 | 45 | +3 |
| PPP | 582 RV | 1/27-29/12 | 45 | 45 | Tie |
| Poll | Sample | Date | Romney | Obama | Margin |
