# 1964 United States Senate election in Washington

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The 1964 United States Senate election in Washington was held on November 3, 1964. Incumbent Democrat Henry M. Jackson won a third term in office with a landslide victory over Republican Superintendent of Instruction Lloyd J. Andrews.

## Blanket primary
### Candidates
#### Democratic

* Alice Franklin Bryant
* Arthur C. DeWitt
* Henry M. Jackson, incumbent United States Senator since 1953

#### Republican

* Lloyd J. Andrews, State Superintendent of Public Instruction
* David J. Williams
* Mary Elizabeth Whitner

### Results

1964 U.S. Senate primary election in Washington :
| Party | Party | Candidate | Votes | % |
| | Democratic | Henry M. Jackson (incumbent) | 478,892 | 59.61% |
| | Republican | Lloyd J. Andrews | 216,616 | 26.96% |
| | Republican | David J. Williams | 37,450 | 4.66% |
| | Democratic | Alice Franklin Bryant | 29,052 | 3.62% |
| | Democratic | Arthur C. DeWitt | 28,683 | 3.57% |
| | Republican | Mary Elizabeth Whitner | 12,704 | 1.58% |
| Total votes | Total votes | Total votes | 903,397 | 100.00% |

## General election
### Results

1964 U.S. Senate election in Washington :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Henry M. Jackson (incumbent) | 875,950 | 72.21% | 5.11 |
| | Republican | Lloyd J. Andrews | 337,138 | 27.79% | 3.59 |
| Total votes | Total votes | Total votes | 1,213,088 | 100.00% | |
| | Democratic hold | Democratic hold | Swing | | |