Adams |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 1353 |
| Don Magnuson | D | 1141 |
| Henry Killman | SL | 9 |
Asotin |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 2404 |
| Al Canwell | R | 1410 |
| Henry Killman | SL | 1 |
Benton |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 10022 |
| Al Canwell | R | 7467 |
| Henry Killman | SL | 22 |
Chelan |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 7027 |
| Al Canwell | R | 6322 |
| Henry Killman | SL | 32 |
Clallam |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 5747 |
| Al Canwell | R | 3543 |
| Henry Killman | SL | 7 |
Clark |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 15800 |
| Al Canwell | R | 10373 |
| Henry Killman | SL | 15 |
Columbia |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 868 |
| Don Magnuson | D | 695 |
| Henry Killman | SL | 1 |
Cowlitz |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 11103 |
| Al Canwell | R | 5904 |
| Henry Killman | SL | 22 |
Douglas |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 2702 |
| Al Canwell | R | 1636 |
| Henry Killman | SL | 5 |
Ferry |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 819 |
| Al Canwell | R | 434 |
| Henry Killman | SL | 0 |
Franklin |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 2855 |
| Al Canwell | R | 1669 |
| Henry Killman | SL | 11 |
Garfield |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 706 |
| Don Magnuson | D | 635 |
| Henry Killman | SL | 1 |
Grant |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 4851 |
| Al Canwell | R | 2373 |
| Henry Killman | SL | 8 |
Grays Harbor |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 11522 |
| Al Canwell | R | 6267 |
| Henry Killman | SL | 73 |
Island |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 2145 |
| Al Canwell | R | 1737 |
| Henry Killman | SL | 5 |
Jefferson |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 1937 |
| Al Canwell | R | 1211 |
| Henry Killman | SL | 5 |
King |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 149506 |
| Al Canwell | R | 116131 |
| Henry Killman | SL | 2108 |
Kitsap |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 19890 |
| Al Canwell | R | 8045 |
| Henry Killman | SL | 31 |
Kittitas |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 3982 |
| Al Canwell | R | 2743 |
| Henry Killman | SL | 16 |
Klickitat |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 1929 |
| Al Canwell | R | 1711 |
| Henry Killman | SL | 10 |
Lewis |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 7526 |
| Al Canwell | R | 7071 |
| Henry Killman | SL | 19 |
Lincoln |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 2088 |
| Don Magnuson | D | 2029 |
| Henry Killman | SL | 2 |
Mason |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 3720 |
| Al Canwell | R | 2107 |
| Henry Killman | SL | 7 |
Okanogan |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 5261 |
| Al Canwell | R | 3429 |
| Henry Killman | SL | 8 |
Pacific |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 3752 |
| Al Canwell | R | 1985 |
| Henry Killman | SL | 1 |
Pend Oreille |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 1404 |
| Al Canwell | R | 942 |
| Henry Killman | SL | 4 |
Pierce |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 52038 |
| Al Canwell | R | 30855 |
| Henry Killman | SL | 481 |
San Juan |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 706 |
| Don Magnuson | D | 666 |
| Henry Killman | SL | 6 |
Skagit |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 8250 |
| Al Canwell | R | 6029 |
| Henry Killman | SL | 15 |
Skamania |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 980 |
| Al Canwell | R | 564 |
| Henry Killman | SL | 3 |
Snohomish |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 26673 |
| Al Canwell | R | 14528 |
| Henry Killman | SL | 184 |
Spokane |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 41250 |
| Al Canwell | R | 35425 |
| Henry Killman | SL | 121 |
Stevens |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 3333 |
| Al Canwell | R | 2809 |
| Henry Killman | SL | 8 |
Thurston |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 10257 |
| Al Canwell | R | 8648 |
| Henry Killman | SL | 21 |
Wahkiakum |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 989 |
| Al Canwell | R | 415 |
| Henry Killman | SL | 6 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 7779 |
| Don Magnuson | D | 5471 |
| Henry Killman | SL | 5 |
Whatcom |
| Candidate | Party | Votes |
|---|
| Don Magnuson | D | 13520 |
| Al Canwell | R | 10503 |
| Henry Killman | SL | 181 |
Whitman |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 5409 |
| Don Magnuson | D | 4598 |
| Henry Killman | SL | 14 |
Yakima |
| Candidate | Party | Votes |
|---|
| Al Canwell | R | 18894 |
| Don Magnuson | D | 15616 |
| Henry Killman | SL | 193 |