The 1920 South Carolina United States Senate election was held on November 2, 1920 to select the U.S. Senator from the state of South Carolina. Incumbent Democratic Senator Ellison D. Smith won the Democratic primary and was unopposed in the general election to win another six-year term.
Senator Ellison D. Smith was opposed in the Democratic primary by George Warren of Hampton. Smith was the leader in the first primary election on August 31 and won the runoff election two weeks later on September 14. There was no opposition to the Democratic candidate in the general election so Smith was elected to another six-year term in the Senate.
Jordan, Frank E. The Primary State: A History of the Democratic Party in South Carolina, 1876-1962. pp. 67–68.
"Report of the Secretary of State to the General Assembly of South Carolina. Part II." Reports of State Officers Boards and Committees to the General Assembly of the State of South Carolina. Volume I. Columbia, SC: 1921, p. 62.