South Carolina held special elections on November 7, 2017, deciding 1 legislative seat.
Legislature
- House (124 seats): 44 D, 80 R before the election, 44 D, 80 R after; control stayed with Republicans.
- Senate (46 seats): 18 D, 28 R before the election, 18 D, 28 R after; control stayed with Republicans.
Legislative races
| Race | Winner | Others | Notes |
|---|---|---|---|
| House 113 | Marvin Pendarvis (D) 80.9% | Theron Sandy II (R) 19% |