The 1948 United States House of Representatives elections in South Carolina were held on November 2, 1948 to select six Representatives for two-year terms from the state of South Carolina. Four incumbents were re-elected, but John J. Riley of the 2nd congressional district was defeated in the Democratic primary by Hugo S. Sims, Jr. The seat remained with the Democrats along with the open seat in the 3rd congressional district and the composition of the state delegation remained solely Democratic.
Incumbent Democratic Congressman John J. Riley of the 2nd congressional district, in office since 1945, was defeated in the Democratic primary by Hugo S. Sims, Jr. who also defeated Republican W. Edward Moore in the general election.
Incumbent Democratic Congressman W.J. Bryan Dorn of the 3rd congressional district, in office since 1947, chose to not seek re-election and instead made an unsuccessful run for Senator. James Butler Hare won the Democratic primary and defeated Republican D.F. Merill in the general election.
Incumbent Democratic Congressman James P. Richards of the 5th congressional district, in office since 1933, defeated Roy C. Cobb in the Democratic primary and Republican J.D. Hambright in the general election.
Jordan, Frank E. The Primary State: A History of the Democratic Party in South Carolina, 1876-1962. pp. 107, 116, 125.
"Supplemental Report of the Secretary of State to the General Assembly of South Carolina." Reports and Resolutions of South Carolina to the General Assembly of the State of South Carolina. Volume I. Columbia, SC: 1949, pp. 12–14.
