| Candidate | Votes | % |
|---|---|---|
| Judy Biggert * (R) | 178,604 | 54% |
| Scott Harper (D) | 145,312 | 44% |
| Steve Alesch (Green) | 9,286 | 3% |
Key: * Incumbent | 
Winner
Precincts: 100% | Updated: 2:32 PM ET | Source: AP
WinnerPrecincts: 100% | Updated: 2:32 PM ET | Source: AP
| Candidate | Votes | % |
|---|---|---|
| Judy Biggert * (R) | 178,604 | 54% |
| Scott Harper (D) | 145,312 | 44% |
| Steve Alesch (Green) | 9,286 | 3% |
Winner