The 1970 United States House of Representatives elections in South Carolina were held on November 3, 1970, to select six Representatives for two-year terms from the state of South Carolina. The primary elections were held on June 9 and the runoff elections were held two weeks later on June 23. All five incumbents who ran were re-elected and the open seat in the 2nd district was retained by the Republicans. The composition of the state delegation remained five Democrats and one Republican.