| District | Winner | Runner-Up | Other | Total Votes | |||||
|---|---|---|---|---|---|---|---|---|---|
| District 01 | Jim Leach (R) | 109,694 | 51.9% | Ed Mezvinsky* (D) | 101,024 | 47.8% | 486 [+] | 0.2% | 211,204 |
| District 02 | Michael Blouin* (D) | 102,980 | 50.3% | Tom Riley (R) | 100,344 | 49.1% | 1,232 [+] | 0.6% | 204,556 |
| District 03 | Charles Grassley* (R) | 117,957 | 56.5% | Stephen Rapp (D) | 90,981 | 43.5% | 5 | 0.0% | 208,943 |
| District 04 | Neal Smith* (D) | 145,343 | 69.1% | Charles Minor (R) | 65,013 | 30.9% | 8 | 0.0% | 210,364 |
| District 05 | Tom Harkin* (D) | 135,600 | 64.9% | Kenneth Fulk (R) | 71,377 | 34.1% | 2,085 [+] | 1.0% | 209,062 |
| District 06 | Berkley Bedell* (D) | 133,507 | 67.4% | Joanne Soper (R) | 62,292 | 31.5% | 2,213 [+] | 1.1% | 198,012 |
| Total R vote: 526,677 (42.4%) Total D vote: 709,435 (57.1%) | |||||||||