The 1940 South Carolina United States House of Representatives elections were held on November 5, 1940 to select six Representatives for two-year terms from the state of South Carolina. All five incumbents who ran were re-elected and the open seat in the 1st congressional district was retained by the Democrats. The composition of the state delegation thus remained solely Democratic.
Incumbent Democratic Congressman Joseph R. Bryson of the 4th congressional district, in office since 1939, defeated Virgil Evans in the Democratic primary and Republican J.D. McCullough in the general election.
Incumbent Democratic Congressman John L. McMillan of the 6th congressional district, in office since 1939, defeated James P. "Spot" Mozingo in the Democratic primary and Republican C.B. Ruffin in the general election.
Jordan, Frank E. The Primary State: A History of the Democratic Party in South Carolina, 1876-1962. pp. 99, 106, 111, 116, 120, 125.
"Supplemental Report of the Secretary of State to the General Assembly of South Carolina." Report of the State Officers Boards and Committees to the General Assembly of the State of South Carolina. Volume I. Columbia, SC: 1941, pp. 7–9.