2012 Presidential Election State Polls – South Dakota
| Poll | Date | Romney | Obama | Margin |
| 2012 Final Results | 11/6/2012 | 57.9 | 39.9 | +18.0 |
| Average of Polls | Since 11/4/12 | 53.0 | 41.0 | +12.0 |
| Neilson Brothers Polling | 10/31-11/4/12 | 53 | 41 | +12 |
| Neilson Brothers Polling | 8/3/2012 | 49 | 43 | +6 |
| Poll | Date | Romney | Obama | Margin |
