Adams |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1255 |
| John J. O'Connell | D | 709 |
| Fred H. Dore | D | 477 |
| William Mullen | R | 200 |
| Edward Heavey | D | 172 |
Asotin |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 1161 |
| Slade Gorton | R | 873 |
| Fred H. Dore | D | 757 |
| William Mullen | R | 304 |
| Edward Heavey | D | 188 |
Benton |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 6953 |
| John J. O'Connell | D | 4907 |
| Fred H. Dore | D | 3837 |
| William Mullen | R | 1502 |
| Edward Heavey | D | 789 |
Chelan |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 3643 |
| Fred H. Dore | D | 2019 |
| John J. O'Connell | D | 1969 |
| Edward Heavey | D | 1195 |
| William Mullen | R | 841 |
Clallam |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 4050 |
| Fred H. Dore | D | 2778 |
| John J. O'Connell | D | 2685 |
| Edward Heavey | D | 1216 |
| William Mullen | R | 565 |
Clark |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 9287 |
| Slade Gorton | R | 9042 |
| Fred H. Dore | D | 5398 |
| Edward Heavey | D | 3773 |
| William Mullen | R | 2249 |
Columbia |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 623 |
| John J. O'Connell | D | 364 |
| Fred H. Dore | D | 301 |
| William Mullen | R | 143 |
| Edward Heavey | D | 52 |
Cowlitz |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 5218 |
| John J. O'Connell | D | 4308 |
| Fred H. Dore | D | 3642 |
| Edward Heavey | D | 1642 |
| William Mullen | R | 869 |
Douglas |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1612 |
| John J. O'Connell | D | 1181 |
| Fred H. Dore | D | 1036 |
| Edward Heavey | D | 404 |
| William Mullen | R | 275 |
Ferry |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 332 |
| Slade Gorton | R | 273 |
| Fred H. Dore | D | 174 |
| William Mullen | R | 102 |
| Edward Heavey | D | 57 |
Franklin |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 2009 |
| Fred H. Dore | D | 1979 |
| John J. O'Connell | D | 1646 |
| William Mullen | R | 545 |
| Edward Heavey | D | 442 |
Garfield |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 407 |
| John J. O'Connell | D | 277 |
| Fred H. Dore | D | 149 |
| William Mullen | R | 103 |
| Edward Heavey | D | 30 |
Grant |
| Candidate | Party | Votes |
|---|
| Fred H. Dore | D | 2915 |
| Slade Gorton | R | 2899 |
| John J. O'Connell | D | 2135 |
| William Mullen | R | 676 |
| Edward Heavey | D | 617 |
Grays Harbor |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 4782 |
| Fred H. Dore | D | 4732 |
| Slade Gorton | R | 3986 |
| Edward Heavey | D | 1545 |
| William Mullen | R | 696 |
Island |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 3180 |
| Fred H. Dore | D | 2230 |
| John J. O'Connell | D | 1061 |
| Edward Heavey | D | 778 |
| William Mullen | R | 453 |
Jefferson |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1173 |
| Fred H. Dore | D | 1016 |
| John J. O'Connell | D | 803 |
| Edward Heavey | D | 472 |
| William Mullen | R | 281 |
King |
| Candidate | Party | Votes |
|---|
| Fred H. Dore | D | 105654 |
| Slade Gorton | R | 104647 |
| Edward Heavey | D | 56456 |
| John J. O'Connell | D | 28844 |
| William Mullen | R | 13878 |
Kitsap |
| Candidate | Party | Votes |
|---|
| Fred H. Dore | D | 8999 |
| Slade Gorton | R | 8123 |
| John J. O'Connell | D | 6341 |
| Edward Heavey | D | 3117 |
| William Mullen | R | 1230 |
Kittitas |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 2194 |
| Fred H. Dore | D | 1611 |
| John J. O'Connell | D | 1463 |
| Edward Heavey | D | 483 |
| William Mullen | R | 367 |
Klickitat |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 1375 |
| Slade Gorton | R | 1101 |
| Fred H. Dore | D | 582 |
| William Mullen | R | 346 |
| Edward Heavey | D | 192 |
Lewis |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 4484 |
| John J. O'Connell | D | 3802 |
| Fred H. Dore | D | 3562 |
| Edward Heavey | D | 1000 |
| William Mullen | R | 843 |
Lincoln |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1696 |
| John J. O'Connell | D | 891 |
| Fred H. Dore | D | 762 |
| William Mullen | R | 284 |
| Edward Heavey | D | 132 |
Mason |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1983 |
| Fred H. Dore | D | 1842 |
| John J. O'Connell | D | 1709 |
| Edward Heavey | D | 873 |
| William Mullen | R | 327 |
Okanogan |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 2513 |
| Slade Gorton | R | 2279 |
| Fred H. Dore | D | 1319 |
| Edward Heavey | D | 619 |
| William Mullen | R | 587 |
Pacific |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 1553 |
| Fred H. Dore | D | 1298 |
| Slade Gorton | R | 1224 |
| Edward Heavey | D | 521 |
| William Mullen | R | 234 |
Pend Oreille |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 644 |
| John J. O'Connell | D | 599 |
| Fred H. Dore | D | 426 |
| William Mullen | R | 141 |
| Edward Heavey | D | 95 |
Pierce |
| Candidate | Party | Votes |
|---|
| Fred H. Dore | D | 33681 |
| Slade Gorton | R | 24877 |
| John J. O'Connell | D | 23887 |
| Edward Heavey | D | 8371 |
| William Mullen | R | 4347 |
San Juan |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1015 |
| Fred H. Dore | D | 372 |
| John J. O'Connell | D | 285 |
| Edward Heavey | D | 199 |
| William Mullen | R | 196 |
Skagit |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 5394 |
| Fred H. Dore | D | 5229 |
| John J. O'Connell | D | 3140 |
| Edward Heavey | D | 1677 |
| William Mullen | R | 941 |
Skamania |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 676 |
| Slade Gorton | R | 451 |
| Fred H. Dore | D | 316 |
| William Mullen | R | 202 |
| Edward Heavey | D | 136 |
Snohomish |
| Candidate | Party | Votes |
|---|
| Fred H. Dore | D | 19542 |
| Slade Gorton | R | 17182 |
| John J. O'Connell | D | 9736 |
| Edward Heavey | D | 8353 |
| William Mullen | R | 3373 |
Spokane |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 26674 |
| John J. O'Connell | D | 17820 |
| Fred H. Dore | D | 16457 |
| William Mullen | R | 4531 |
| Edward Heavey | D | 3577 |
Stevens |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 1655 |
| John J. O'Connell | D | 1462 |
| Fred H. Dore | D | 878 |
| William Mullen | R | 407 |
| Edward Heavey | D | 225 |
Thurston |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 9975 |
| Fred H. Dore | D | 7355 |
| John J. O'Connell | D | 6401 |
| Edward Heavey | D | 3009 |
| William Mullen | R | 1284 |
Wahkiakum |
| Candidate | Party | Votes |
|---|
| John J. O'Connell | D | 412 |
| Slade Gorton | R | 363 |
| Fred H. Dore | D | 196 |
| Edward Heavey | D | 109 |
| William Mullen | R | 66 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 4361 |
| Fred H. Dore | D | 2460 |
| John J. O'Connell | D | 2177 |
| William Mullen | R | 1066 |
| Edward Heavey | D | 583 |
Whatcom |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 7154 |
| Fred H. Dore | D | 5128 |
| John J. O'Connell | D | 3501 |
| Edward Heavey | D | 2314 |
| William Mullen | R | 1424 |
Whitman |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 3785 |
| John J. O'Connell | D | 1852 |
| Fred H. Dore | D | 1240 |
| William Mullen | R | 616 |
| Edward Heavey | D | 361 |
Yakima |
| Candidate | Party | Votes |
|---|
| Slade Gorton | R | 10547 |
| Fred H. Dore | D | 7259 |
| John J. O'Connell | D | 7095 |
| William Mullen | R | 3998 |
| Edward Heavey | D | 1882 |