Adams |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 1326 |
| Marilyn B. Ward | R | 1002 |
| Harris Hunter | D | 215 |
Asotin |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 1486 |
| Marilyn B. Ward | R | 1036 |
| Harris Hunter | D | 365 |
Benton |
| Candidate | Party | Votes |
|---|
| Marilyn B. Ward | R | 10256 |
| Robert S. O'Brien | D | 8401 |
| Harris Hunter | D | 2312 |
Chelan |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 4291 |
| Marilyn B. Ward | R | 3690 |
| Harris Hunter | D | 1454 |
Clallam |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 6988 |
| Marilyn B. Ward | R | 4819 |
| Harris Hunter | D | 1306 |
Clark |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 11877 |
| Marilyn B. Ward | R | 9845 |
| Harris Hunter | D | 3825 |
Columbia |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 625 |
| Marilyn B. Ward | R | 555 |
| Harris Hunter | D | 132 |
Cowlitz |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 6341 |
| Marilyn B. Ward | R | 2973 |
| Harris Hunter | D | 1736 |
Douglas |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 2277 |
| Marilyn B. Ward | R | 1669 |
| Harris Hunter | D | 632 |
Ferry |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 623 |
| Marilyn B. Ward | R | 391 |
| Harris Hunter | D | 130 |
Franklin |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 2359 |
| Marilyn B. Ward | R | 2320 |
| Harris Hunter | D | 871 |
Garfield |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 439 |
| Marilyn B. Ward | R | 268 |
| Harris Hunter | D | 63 |
Grant |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 4913 |
| Marilyn B. Ward | R | 3361 |
| Harris Hunter | D | 1493 |
Grays Harbor |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 9413 |
| Marilyn B. Ward | R | 3955 |
| Harris Hunter | D | 2122 |
Island |
| Candidate | Party | Votes |
|---|
| Marilyn B. Ward | R | 4845 |
| Robert S. O'Brien | D | 4823 |
| Harris Hunter | D | 1060 |
Jefferson |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 2396 |
| Marilyn B. Ward | R | 1617 |
| Harris Hunter | D | 549 |
King |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 143236 |
| Marilyn B. Ward | R | 99046 |
| Harris Hunter | D | 30232 |
Kitsap |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 17836 |
| Marilyn B. Ward | R | 11865 |
| Harris Hunter | D | 4182 |
Kittitas |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 3044 |
| Marilyn B. Ward | R | 2012 |
| Harris Hunter | D | 694 |
Klickitat |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 1362 |
| Marilyn B. Ward | R | 1057 |
| Harris Hunter | D | 391 |
Lewis |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 6464 |
| Marilyn B. Ward | R | 4434 |
| Harris Hunter | D | 1707 |
Lincoln |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 1472 |
| Marilyn B. Ward | R | 1277 |
| Harris Hunter | D | 344 |
Mason |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 4266 |
| Marilyn B. Ward | R | 2727 |
| Harris Hunter | D | 1537 |
Okanogan |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 3486 |
| Marilyn B. Ward | R | 2189 |
| Harris Hunter | D | 712 |
Pacific |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 3042 |
| Marilyn B. Ward | R | 1275 |
| Harris Hunter | D | 573 |
Pend Oreille |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 1054 |
| Marilyn B. Ward | R | 732 |
| Harris Hunter | D | 267 |
Pierce |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 43235 |
| Marilyn B. Ward | R | 26593 |
| Harris Hunter | D | 11226 |
San Juan |
| Candidate | Party | Votes |
|---|
| Marilyn B. Ward | R | 1435 |
| Robert S. O'Brien | D | 1054 |
| Harris Hunter | D | 254 |
Skagit |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 9063 |
| Marilyn B. Ward | R | 6941 |
| Harris Hunter | D | 2060 |
Skamania |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 803 |
| Marilyn B. Ward | R | 495 |
| Harris Hunter | D | 225 |
Snohomish |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 33830 |
| Marilyn B. Ward | R | 22913 |
| Harris Hunter | D | 8200 |
Spokane |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 34127 |
| Marilyn B. Ward | R | 28942 |
| Harris Hunter | D | 6503 |
Stevens |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 2847 |
| Marilyn B. Ward | R | 2527 |
| Harris Hunter | D | 602 |
Thurston |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 14123 |
| Harris Hunter | D | 10474 |
| Marilyn B. Ward | R | 8572 |
Wahkiakum |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 558 |
| Marilyn B. Ward | R | 306 |
| Harris Hunter | D | 113 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 4052 |
| Marilyn B. Ward | R | 3661 |
| Harris Hunter | D | 843 |
Whatcom |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 10010 |
| Marilyn B. Ward | R | 7335 |
| Harris Hunter | D | 2798 |
Whitman |
| Candidate | Party | Votes |
|---|
| Marilyn B. Ward | R | 2814 |
| Robert S. O'Brien | D | 2798 |
| Harris Hunter | D | 628 |
Yakima |
| Candidate | Party | Votes |
|---|
| Robert S. O'Brien | D | 11013 |
| Marilyn B. Ward | R | 10602 |
| Harris Hunter | D | 3106 |