Island | ||
| Candidate | Party | Votes |
|---|---|---|
| John Koster | R | 15426 |
| Rick Larsen | D | 14941 |
| Glen S. Johnson | NL | 779 |
| Stuart Andrews | R | 374 |
San Juan | ||
| Candidate | Party | Votes |
| Rick Larsen | D | 4488 |
| John Koster | R | 2910 |
| Stuart Andrews | R | 394 |
| Glen S. Johnson | NL | 183 |
Skagit | ||
| Candidate | Party | Votes |
| John Koster | R | 20864 |
| Rick Larsen | D | 20788 |
| Stuart Andrews | R | 1086 |
| Glen S. Johnson | NL | 864 |
Snohomish | ||
| Candidate | Party | Votes |
| Rick Larsen | D | 71166 |
| John Koster | R | 63879 |
| Stuart Andrews | R | 3813 |
| Glen S. Johnson | NL | 1330 |
Whatcom | ||
| Candidate | Party | Votes |
| Rick Larsen | D | 35234 |
| John Koster | R | 31581 |
| Stuart Andrews | R | 2005 |
| Glen S. Johnson | NL | 1075 |