Cowlitz | ||
| Candidate | Party | Votes |
|---|---|---|
| Mike Riley | D | 5842 |
| Mark R. Obtinario | R | 1852 |
Grays Harbor | ||
| Candidate | Party | Votes |
| Mike Riley | D | 4607 |
| Mark R. Obtinario | R | 1603 |
Pacific | ||
| Candidate | Party | Votes |
| Mike Riley | D | 3767 |
| Mark R. Obtinario | R | 1176 |
Wahkiakum | ||
| Candidate | Party | Votes |
| Mike Riley | D | 768 |
| Mark R. Obtinario | R | 229 |