Benton |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 36842 |
| Mark Epperson | D | 9280 |
Chelan |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 14476 |
| Mark Epperson | D | 4092 |
Clark |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 558 |
| Mark Epperson | D | 337 |
Douglas |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 7332 |
| Mark Epperson | D | 2075 |
Franklin |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 8036 |
| Mark Epperson | D | 2604 |
Grant |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 13027 |
| Mark Epperson | D | 3798 |
Kittitas |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 7469 |
| Mark Epperson | D | 3236 |
Klickitat |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 4477 |
| Mark Epperson | D | 2029 |
Okanogan |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 8790 |
| Mark Epperson | D | 3856 |
Skamania |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 1798 |
| Mark Epperson | D | 1062 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 471 |
| Mark Epperson | D | 220 |
Yakima |
| Candidate | Party | Votes |
|---|
| Sid Morrison | R | 47046 |
| Mark Epperson | D | 14569 |