Cowlitz | ||
| Candidate | Party | Votes |
|---|---|---|
| Mike Riley | D | 13231 |
| Mark R. Obtinario | R | 4081 |
Grays Harbor | ||
| Candidate | Party | Votes |
| Mike Riley | D | 7894 |
| Mark R. Obtinario | R | 2964 |
Pacific | ||
| Candidate | Party | Votes |
| Mike Riley | D | 6175 |
| Mark R. Obtinario | R | 1910 |
Wahkiakum | ||
| Candidate | Party | Votes |
| Mike Riley | D | 1247 |
| Mark R. Obtinario | R | 390 |