Benton | ||
| Candidate | Party | Votes |
|---|---|---|
| John David Mastin | R | 3403 |
| Elizabeth Jo Clark | D | 2011 |
Columbia | ||
| Candidate | Party | Votes |
| John David Mastin | R | 1350 |
| Elizabeth Jo Clark | D | 426 |
Franklin | ||
| Candidate | Party | Votes |
| John David Mastin | R | 4912 |
| Elizabeth Jo Clark | D | 2607 |
Walla Walla | ||
| Candidate | Party | Votes |
| John David Mastin | R | 10619 |
| Elizabeth Jo Clark | D | 4355 |