Adams |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3340 |
| Deborah Senn | D | 1322 |
| J. Bradley Gibson | L | 75 |
| Paul Richmond | G | 54 |
Asotin |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 4716 |
| Deborah Senn | D | 3124 |
| J. Bradley Gibson | L | 201 |
| Paul Richmond | G | 100 |
Benton |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 42465 |
| Deborah Senn | D | 17716 |
| J. Bradley Gibson | L | 1380 |
| Paul Richmond | G | 631 |
Chelan |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 18176 |
| Deborah Senn | D | 8759 |
| J. Bradley Gibson | L | 504 |
| Paul Richmond | G | 348 |
Clallam |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 18321 |
| Deborah Senn | D | 13938 |
| J. Bradley Gibson | L | 773 |
| Paul Richmond | G | 686 |
Clark |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 85111 |
| Deborah Senn | D | 64613 |
| J. Bradley Gibson | L | 3233 |
| Paul Richmond | G | 2641 |
Columbia |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1331 |
| Deborah Senn | D | 572 |
| J. Bradley Gibson | L | 32 |
| Paul Richmond | G | 21 |
Cowlitz |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 19138 |
| Deborah Senn | D | 19097 |
| J. Bradley Gibson | L | 871 |
| Paul Richmond | G | 534 |
Douglas |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 8547 |
| Deborah Senn | D | 3850 |
| J. Bradley Gibson | L | 218 |
| Paul Richmond | G | 124 |
Ferry |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1810 |
| Deborah Senn | D | 1114 |
| J. Bradley Gibson | L | 91 |
| Paul Richmond | G | 63 |
Franklin |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 10266 |
| Deborah Senn | D | 4828 |
| J. Bradley Gibson | L | 309 |
| Paul Richmond | G | 146 |
Garfield |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 821 |
| Deborah Senn | D | 348 |
| J. Bradley Gibson | L | 24 |
| Paul Richmond | G | 9 |
Grant |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 16575 |
| Deborah Senn | D | 7252 |
| J. Bradley Gibson | L | 517 |
| Paul Richmond | G | 272 |
Grays Harbor |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 13566 |
| Deborah Senn | D | 11897 |
| J. Bradley Gibson | L | 662 |
| Paul Richmond | G | 352 |
Island |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 20228 |
| Deborah Senn | D | 14425 |
| J. Bradley Gibson | L | 690 |
| Paul Richmond | G | 469 |
Jefferson |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 9438 |
| Rob McKenna | R | 7503 |
| J. Bradley Gibson | L | 404 |
| Paul Richmond | G | 404 |
King |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 421843 |
| Rob McKenna | R | 383397 |
| J. Bradley Gibson | L | 16227 |
| Paul Richmond | G | 15726 |
Kitsap |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 60644 |
| Deborah Senn | D | 48133 |
| J. Bradley Gibson | L | 2625 |
| Paul Richmond | G | 1722 |
Kittitas |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 9213 |
| Deborah Senn | D | 5372 |
| J. Bradley Gibson | L | 352 |
| Paul Richmond | G | 204 |
Klickitat |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 4540 |
| Deborah Senn | D | 3506 |
| J. Bradley Gibson | L | 237 |
| Paul Richmond | G | 138 |
Lewis |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 20124 |
| Deborah Senn | D | 9209 |
| J. Bradley Gibson | L | 726 |
| Paul Richmond | G | 435 |
Lincoln |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3758 |
| Deborah Senn | D | 1507 |
| J. Bradley Gibson | L | 117 |
| Paul Richmond | G | 57 |
Mason |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 12909 |
| Deborah Senn | D | 9770 |
| J. Bradley Gibson | L | 663 |
| Paul Richmond | G | 438 |
Okanogan |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 8877 |
| Deborah Senn | D | 5399 |
| J. Bradley Gibson | L | 436 |
| Paul Richmond | G | 274 |
Pacific |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 4711 |
| Rob McKenna | R | 4411 |
| J. Bradley Gibson | L | 252 |
| Paul Richmond | G | 186 |
Pend Oreille |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3382 |
| Deborah Senn | D | 2199 |
| J. Bradley Gibson | L | 194 |
| Paul Richmond | G | 76 |
Pierce |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 161770 |
| Deborah Senn | D | 126703 |
| J. Bradley Gibson | L | 6292 |
| Paul Richmond | G | 3941 |
San Juan |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 5054 |
| Rob McKenna | R | 3776 |
| Paul Richmond | G | 418 |
| J. Bradley Gibson | L | 212 |
Skagit |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 27594 |
| Deborah Senn | D | 20310 |
| J. Bradley Gibson | L | 968 |
| Paul Richmond | G | 799 |
Skamania |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 2363 |
| Deborah Senn | D | 2068 |
| J. Bradley Gibson | L | 162 |
| Paul Richmond | G | 133 |
Snohomish |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 152846 |
| Deborah Senn | D | 118422 |
| J. Bradley Gibson | L | 6181 |
| Paul Richmond | G | 3299 |
Spokane |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 113682 |
| Deborah Senn | D | 73132 |
| J. Bradley Gibson | L | 3755 |
| Paul Richmond | G | 2499 |
Stevens |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 12280 |
| Deborah Senn | D | 5973 |
| J. Bradley Gibson | L | 537 |
| Paul Richmond | G | 308 |
Thurston |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 58156 |
| Deborah Senn | D | 43051 |
| Paul Richmond | G | 2969 |
| J. Bradley Gibson | L | 2285 |
Wahkiakum |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1035 |
| Deborah Senn | D | 850 |
| J. Bradley Gibson | L | 63 |
| Paul Richmond | G | 39 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 13665 |
| Deborah Senn | D | 7092 |
| J. Bradley Gibson | L | 390 |
| Paul Richmond | G | 286 |
Whatcom |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 42061 |
| Deborah Senn | D | 36899 |
| Paul Richmond | G | 2168 |
| J. Bradley Gibson | L | 1767 |
Whitman |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 9284 |
| Deborah Senn | D | 6612 |
| J. Bradley Gibson | L | 384 |
| Paul Richmond | G | 320 |
Yakima |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 43687 |
| Deborah Senn | D | 23856 |
| J. Bradley Gibson | L | 1983 |
| Paul Richmond | G | 731 |