2008 Illinois Republican Presidential Primary
| Pollster | Dates | N/Pop | Giuliani | Huckabee | McCain | Paul | Romney | Undecided |
| SurveyUSA | 2/2-3/08 | 441 LV | - | 17 | 46 | 8 | 25 | 1 |
| Tribune/WGN | 1/30-31/08 | 500 LV | - | 15 | 43 | 4 | 20 | 17 |
| ARG | 1/30-31/08 | 600 LV | - | 3 | 48 | 3 | 34 | 9 |
| Rasmussen | 1/29/2008 | 504 LV | - | 16 | 34 | 10 | 26 | - |
| Post-Dispatch/ Research 2000 | 1/21-24/08 | 500 LV | 13 | 11 | 31 | 7 | 20 | 18 |
| Tribune/WGN | 12/9-13/07 | 500 LV | 23 | 21 | 12 | 3 | 14 | 14 |
| ARG | 7/6-9/07 | 600 LV | 30 | 2 | 12 | 1 | 11 | 14 |
| ARG | 1/11-14/07 | 600 LV | 33 | 0 | 24 | - | 12 | 11 |
