1946 United States Senate election in Washington
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 County results Cain: 40–50% 50–60% 60–70% 70–80% Mitchell: 50–60% | |||||||||||||||||
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| Elections in Washington | ||||||||
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The 1946 United States Senate election in Washington was held on November 5, 1946. Incumbent Democrat Hugh Mitchell, who had been appointed to fill the unexpired term of Monrad Wallgren, ran for a full term in office, but was defeated by Republican Mayor of Tacoma Harry Cain.
Blanket primary
Candidates
Democratic
- Sam C. Herren
- Russell Fluent, Washington State Treasurer
- Hugh Mitchell, interim U.S. Senator since 1945
Republican
- Harry Cain, Mayor of Tacoma
- J. Parkhurst Douglass
Results
| Party | Candidate | Votes | % | |
|---|---|---|---|---|
| Republican | Harry Cain | 158,596 | 43.88% | |
| Democratic | Hugh Mitchell (incumbent) | 134,286 | 37.15% | |
| Democratic | Russell H. Fluent | 35,758 | 9.89% | |
| Republican | Ed F. Oldfield | 21,017 | 5.82% | |
| Republican | Sam C. Herren | 11,789 | 3.26% | |
| Total votes | 361,446 | 100.00% | ||
General election
Results
| Party | Candidate | Votes | % | ±% | |
|---|---|---|---|---|---|
| Republican | Harry Cain | 358,847 | 54.34% |  8.50 | |
| Democratic | Hugh Mitchell (incumbent) | 298,683 | 45.23% |  8.93 | |
| Socialist Labor | Harry Morton | 2,297 | 0.35% | N/A | |
| Socialist Workers | Charles R. Swett | 515 | 0.08% | N/A | |
| Total votes | 660,342 | 100.00% | |||
| Republican gain from Democratic | Swing | ||||
