The 1984 United States House of Representatives elections in South Carolina were held on November 6, 1984, to select six Representatives for two-year terms from the state of South Carolina. The primary elections for the Democrats and the Republicans were held on June 12. All six incumbents were re-elected and the composition of the state delegation remained three Democrats and three Republicans.
Incumbent Republican Congressman Thomas F. Hartnett of the 1st congressional district, in office since 1981, defeated Democratic challenger Ed Pendarvis.
|-| | colspan=5 |Republican hold|-
Incumbent Republican Congressman Floyd Spence of the 2nd congressional district, in office since 1971, defeated Democratic challenger Ken Mosely.
| Democratic primary | ||
|---|---|---|
| Candidate | Votes | % |
| Ken Mosely | 21,560 | 53.0 |
| Nancy Stevenson | 19,125 | 47.0 |
|-| | colspan=5 |Republican hold|-
Incumbent Democratic Congressman Butler Derrick of the 3rd congressional district, in office since 1975, defeated Republican challenger Clarence E. Taylor.
| Republican primary | ||
|---|---|---|
| Candidate | Votes | % |
| Clarence E. Taylor | 3,845 | 64.7 |
| Garfield W. Flurett | 2,096 | 35.3 |
|-| | colspan=5 |Democratic hold|-
Incumbent Republican Congressman Carroll Campbell of the 4th congressional district, in office since 1979, defeated Democratic challenger Jeff Smith.
|-| | colspan=5 |Republican hold|-
Incumbent Democratic Congressman John M. Spratt, Jr. of the 5th congressional district, in office since 1983, defeated two minor party candidates.
|-| | colspan=5 |Democratic hold|-
Incumbent Democratic Congressman Robin Tallon of the 6th congressional district, in office since 1983, won the Democratic primary and defeated Republican Martha Lois Eargle in the general election.
| Democratic primary | ||
|---|---|---|
| Candidate | Votes | % |
| 61,927 | 74.3 | |
| Mary Demetrious | 17,385 | 20.8 |
| Luther Lighty, Jr. | 4,053 | 4.9 |
| Republican primary | ||
|---|---|---|
| Candidate | Votes | % |
| Martha Lois Eargle | 3,120 | 66.5 |
| James N. Maurer | 1,569 | 33.5 |
|-| | colspan=5 |Democratic hold|-