No senate race in Washington this year.
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Senate race by county
| County | Dem | GOP | Ind | |
|---|---|---|---|---|
| Adams | – | – | – | |
| Asotin | – | – | – | |
| Benton | – | – | – | |
| Chelan | – | – | – | |
| Clallam | – | – | – | |
| Clark | – | – | – | |
| Columbia | – | – | – | |
| Cowlitz | – | – | – | |
| Douglas | – | – | – | |
| Ferry | – | – | – | |
| Franklin | – | – | – | |
| Garfield | – | – | – | |
| Grant | – | – | – | |
| Grays Harbor | – | – | – | |
| Island | – | – | – | |
| Jefferson | – | – | – | |
| King | – | – | – | |
| Kitsap | – | – | – | |
| Kittitas | – | – | – | |
| Klickitat | – | – | – | |
| Lewis | – | – | – | |
| Lincoln | – | – | – | |
| Mason | – | – | – | |
| Okanogan | – | – | – | |
| Pacific | – | – | – | |
| Pend Oreille | – | – | – | |
| Pierce | – | – | – | |
| San Juan | – | – | – | |
| Skagit | – | – | – | |
| Skamania | – | – | – | |
| Snohomish | – | – | – | |
| Spokane | – | – | – | |
| Stevens | – | – | – | |
| Thurston | – | – | – | |
| Wahkiakum | – | – | – | |
| Walla Walla | – | – | – | |
| Whatcom | – | – | – | |
| Whitman | – | – | – | |
| Yakima | – | – | – |