Adams |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 797 |
| Harry D. Merritt | D | 534 |
| David C. Coates | S | 54 |
Asotin |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 492 |
| Harry D. Merritt | D | 254 |
| David C. Coates | S | 31 |
Benton |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 932 |
| Harry D. Merritt | D | 241 |
| David C. Coates | S | 164 |
Chelan |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 1303 |
| Harry D. Merritt | D | 353 |
| David C. Coates | S | 214 |
Columbia |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 820 |
| Harry D. Merritt | D | 431 |
| David C. Coates | S | 42 |
Douglas |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 876 |
| Harry D. Merritt | D | 662 |
| David C. Coates | S | 71 |
Ferry |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 390 |
| Harry D. Merritt | D | 292 |
| David C. Coates | S | 114 |
Franklin |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 573 |
| Harry D. Merritt | D | 210 |
| David C. Coates | S | 55 |
Garfield |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 479 |
| Harry D. Merritt | D | 225 |
| David C. Coates | S | 33 |
Grant |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 1023 |
| Harry D. Merritt | D | 377 |
| David C. Coates | S | 169 |
Kittitas |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 1303 |
| Harry D. Merritt | D | 405 |
| David C. Coates | S | 209 |
Lincoln |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 1518 |
| Harry D. Merritt | D | 999 |
| David C. Coates | S | 110 |
Okanogan |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 1202 |
| Harry D. Merritt | D | 600 |
| David C. Coates | S | 264 |
Spokane |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 7826 |
| Harry D. Merritt | D | 4250 |
| David C. Coates | S | 1201 |
Stevens |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 2006 |
| Harry D. Merritt | D | 1110 |
| David C. Coates | S | 602 |
Walla Walla |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 2337 |
| Harry D. Merritt | D | 925 |
| David C. Coates | S | 50 |
Whitman |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 2714 |
| Harry D. Merritt | D | 1609 |
| David C. Coates | S | 227 |
Yakima |
| Candidate | Party | Votes |
|---|
| William L. LaFollette | R | 3535 |
| Harry D. Merritt | D | 946 |
| David C. Coates | S | 388 |