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.
1st congressional district Incumbent Democratic Congressman L. Mendel Rivers of the 1st congressional district, in office since 1941, defeated Republican challenger W.T. Baggott.
General election results
| colspan=5 |Democratic hold
2nd congressional district 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.
Democratic primary Democratic primaryCandidateVotes% Hugo S. Sims, Jr. 33,747 53.7 John J. Riley 29,045 46.3
General election results
| colspan=5 |Democratic hold
3rd congressional district 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.
Democratic primary Democratic primaryCandidateVotes% James Butler Hare 26,007 42.6 John C. Taylor 17,319 28.4 R.L. "Buck" Gamble 12,484 20.4 Leon Rice 5,270 8.6
Democratic primary runoffCandidateVotes%±% James Butler Hare 38,266 65.3 +22.7 John C. Taylor 20,291 34.7 +6.3
General election results
| colspan=5 |Democratic hold
4th congressional district Incumbent Democratic Congressman Joseph R. Bryson of the 4th congressional district, in office since 1939, defeated Republican challenger James B. Gaston.
General election results
| colspan=5 |Democratic hold
5th congressional district 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.
Democratic primary Democratic primaryCandidateVotes% James P. Richards 26,268 60.6 Roy C. Cobb 17,070 39.4
General election results
| colspan=5 |Democratic hold
6th congressional district Incumbent Democratic Congressman John L. McMillan of the 6th congressional district, in office since 1939, defeated Republican challenger F.L. Bradfield.
General election results
| colspan=5 |Democratic hold
See also United States House of Representatives elections, 1948 United States Senate election in South Carolina, 1948 South Carolina's congressional districts
References
"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.