Adams |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1278 |
| Mike Vaska | R | 485 |
| Deborah Senn | D | 395 |
| Mark Sidran | D | 263 |
| J. Bradley Gibson | L | 8 |
Asotin |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1345 |
| Deborah Senn | D | 913 |
| Mark Sidran | D | 578 |
| Mike Vaska | R | 222 |
| J. Bradley Gibson | L | 22 |
Benton |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 12838 |
| Deborah Senn | D | 5463 |
| Mark Sidran | D | 2876 |
| Mike Vaska | R | 2742 |
| J. Bradley Gibson | L | 159 |
Chelan |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 5111 |
| Deborah Senn | D | 2887 |
| Mark Sidran | D | 2198 |
| Mike Vaska | R | 989 |
| J. Bradley Gibson | L | 118 |
Clallam |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 5684 |
| Deborah Senn | D | 4768 |
| Mark Sidran | D | 4372 |
| Mike Vaska | R | 1470 |
| J. Bradley Gibson | L | 157 |
Clark |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 18277 |
| Rob McKenna | R | 16199 |
| Mark Sidran | D | 8647 |
| Mike Vaska | R | 6551 |
| J. Bradley Gibson | L | 418 |
Columbia |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 615 |
| Deborah Senn | D | 194 |
| Mark Sidran | D | 106 |
| Mike Vaska | R | 67 |
| J. Bradley Gibson | L | 4 |
Cowlitz |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 6129 |
| Rob McKenna | R | 3633 |
| Mark Sidran | D | 3528 |
| Mike Vaska | R | 1099 |
| J. Bradley Gibson | L | 156 |
Douglas |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 2944 |
| Deborah Senn | D | 1250 |
| Mark Sidran | D | 868 |
| Mike Vaska | R | 636 |
| J. Bradley Gibson | L | 42 |
Ferry |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 753 |
| Deborah Senn | D | 404 |
| Mike Vaska | R | 243 |
| Mark Sidran | D | 173 |
| J. Bradley Gibson | L | 21 |
Franklin |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3229 |
| Deborah Senn | D | 1474 |
| Mark Sidran | D | 835 |
| Mike Vaska | R | 590 |
| J. Bradley Gibson | L | 41 |
Garfield |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 333 |
| Deborah Senn | D | 103 |
| Mike Vaska | R | 81 |
| Mark Sidran | D | 68 |
| J. Bradley Gibson | L | 6 |
Grant |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 5676 |
| Deborah Senn | D | 2354 |
| Mark Sidran | D | 1528 |
| Mike Vaska | R | 1094 |
| J. Bradley Gibson | L | 83 |
Grays Harbor |
| Candidate | Party | Votes |
|---|
| Mark Sidran | D | 4831 |
| Deborah Senn | D | 4169 |
| Rob McKenna | R | 2436 |
| Mike Vaska | R | 656 |
| J. Bradley Gibson | L | 121 |
Island |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 5751 |
| Deborah Senn | D | 5208 |
| Mark Sidran | D | 4754 |
| Mike Vaska | R | 1997 |
| J. Bradley Gibson | L | 157 |
Jefferson |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 3333 |
| Mark Sidran | D | 3065 |
| Rob McKenna | R | 2250 |
| Mike Vaska | R | 711 |
| J. Bradley Gibson | L | 96 |
King |
| Candidate | Party | Votes |
|---|
| Mark Sidran | D | 152001 |
| Deborah Senn | D | 125591 |
| Rob McKenna | R | 92676 |
| Mike Vaska | R | 25488 |
| J. Bradley Gibson | L | 4338 |
Kitsap |
| Candidate | Party | Votes |
|---|
| Mark Sidran | D | 18481 |
| Deborah Senn | D | 16989 |
| Rob McKenna | R | 16019 |
| Mike Vaska | R | 5094 |
| J. Bradley Gibson | L | 709 |
Kittitas |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3438 |
| Deborah Senn | D | 1813 |
| Mark Sidran | D | 1134 |
| Mike Vaska | R | 587 |
| J. Bradley Gibson | L | 65 |
Klickitat |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1146 |
| Deborah Senn | D | 855 |
| Mark Sidran | D | 420 |
| Mike Vaska | R | 224 |
| J. Bradley Gibson | L | 49 |
Lewis |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 5653 |
| Deborah Senn | D | 2833 |
| Mark Sidran | D | 2653 |
| Mike Vaska | R | 1457 |
| J. Bradley Gibson | L | 105 |
Lincoln |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1558 |
| Deborah Senn | D | 553 |
| Mike Vaska | R | 313 |
| Mark Sidran | D | 286 |
| J. Bradley Gibson | L | 8 |
Mason |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 3349 |
| Rob McKenna | R | 3095 |
| Mark Sidran | D | 2977 |
| Mike Vaska | R | 959 |
| J. Bradley Gibson | L | 98 |
Okanogan |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3285 |
| Deborah Senn | D | 1853 |
| Mark Sidran | D | 987 |
| Mike Vaska | R | 804 |
| J. Bradley Gibson | L | 70 |
Pacific |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 1618 |
| Mark Sidran | D | 1324 |
| Rob McKenna | R | 1031 |
| Mike Vaska | R | 246 |
| J. Bradley Gibson | L | 41 |
Pend Oreille |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 1402 |
| Deborah Senn | D | 910 |
| Mark Sidran | D | 412 |
| Mike Vaska | R | 350 |
| J. Bradley Gibson | L | 34 |
Pierce |
| Candidate | Party | Votes |
|---|
| Mark Sidran | D | 40113 |
| Deborah Senn | D | 39690 |
| Rob McKenna | R | 38037 |
| Mike Vaska | R | 12885 |
| J. Bradley Gibson | L | 1429 |
San Juan |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 1868 |
| Mark Sidran | D | 1401 |
| Rob McKenna | R | 1250 |
| Mike Vaska | R | 269 |
| J. Bradley Gibson | L | 46 |
Skagit |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 7567 |
| Deborah Senn | D | 6830 |
| Mark Sidran | D | 6755 |
| Mike Vaska | R | 2036 |
| J. Bradley Gibson | L | 225 |
Skamania |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 659 |
| Deborah Senn | D | 643 |
| Mark Sidran | D | 326 |
| Mike Vaska | R | 272 |
| J. Bradley Gibson | L | 23 |
Snohomish |
| Candidate | Party | Votes |
|---|
| Mark Sidran | D | 39751 |
| Deborah Senn | D | 35206 |
| Rob McKenna | R | 33492 |
| Mike Vaska | R | 10957 |
| J. Bradley Gibson | L | 1710 |
Spokane |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 35843 |
| Deborah Senn | D | 29492 |
| Mark Sidran | D | 15726 |
| Mike Vaska | R | 11497 |
| J. Bradley Gibson | L | 665 |
Stevens |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 4161 |
| Deborah Senn | D | 1967 |
| Mark Sidran | D | 1009 |
| Mike Vaska | R | 890 |
| J. Bradley Gibson | L | 92 |
Thurston |
| Candidate | Party | Votes |
|---|
| Mark Sidran | D | 16718 |
| Deborah Senn | D | 12562 |
| Rob McKenna | R | 11982 |
| Mike Vaska | R | 3755 |
| J. Bradley Gibson | L | 362 |
Wahkiakum |
| Candidate | Party | Votes |
|---|
| Deborah Senn | D | 340 |
| Mark Sidran | D | 194 |
| Rob McKenna | R | 194 |
| Mike Vaska | R | 73 |
| J. Bradley Gibson | L | 8 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 5059 |
| Deborah Senn | D | 2304 |
| Mark Sidran | D | 1196 |
| Mike Vaska | R | 1027 |
| J. Bradley Gibson | L | 44 |
Whatcom |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 12374 |
| Deborah Senn | D | 11922 |
| Mark Sidran | D | 8740 |
| Mike Vaska | R | 1835 |
| J. Bradley Gibson | L | 693 |
Whitman |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 3353 |
| Deborah Senn | D | 1560 |
| Mark Sidran | D | 956 |
| Mike Vaska | R | 543 |
| J. Bradley Gibson | L | 67 |
Yakima |
| Candidate | Party | Votes |
|---|
| Rob McKenna | R | 13557 |
| Deborah Senn | D | 7853 |
| Mike Vaska | R | 4654 |
| Mark Sidran | D | 3875 |
| J. Bradley Gibson | L | 220 |