1964 United States Senate election in Washington

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.

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