1974 United States Senate election in Washington

The 1974 United States Senate election in Washington was held on November 5, 1974. Incumbent Democratic U.S. Senator Warren Magnuson won a sixth term in office, defeating Republican state senator Jack Metcalf, in a rematch of the previous election.

Blanket primary
The blanket primary was held on September 17, 1974.

Democratic

 * Warren G. Magnuson, incumbent United States Senator
 * John "Hugo Frye" Patric, writer

Republican

 * Jesse Chiang
 * Donald C. Knutson
 * James H. Liedke
 * Jack Metcalf, State Senator
 * June Riggs
 * Richard E. Van Horn

Democratic

 * Warren Magnuson, incumbent U.S. Senator

Republican

 * Jack Metcalf, State Senator