The 1920 United States Senate election in Washington was held on November 2, 1920. Incumbent Republican U.S. Senator Wesley Livsey Jones was re-elected to a third term in office over Farmer-Labor nominee Clemens J. France and former Seattle mayor George F. Cotterill.
Blanket primary
Candidates
Democratic
George F. Cotterill, former Mayor of Seattle
Republican
Frank Erickson
Forest L. Hudson
W.M. Inglis
Wesley Livsey Jones, incumbent Senator since 1909
Results
General election
Candidates
George F. Cotterill, former Mayor of Seattle (Democratic) Clemens J. France, former president of the Municipal League of Seattle and brother of U.S. Senator from Maryland Joseph I. France (Farmer-Labor) Wesley Livsey Jones, incumbent U.S. Senator since 1908 (Republican)