| State: | SC |
| Type: | SC |
| Route: | 55 |
| Map Custom: | yes |
| Length Mi: | 20.990 |
| Length Round: | 3 |
| Length Ref: | [1] [2] |
| Established: | 1931 |
| Direction A: | West |
| Terminus A: | near Kings Creek |
| Junction: | in Clover |
| Direction B: | East |
| Terminus B: | near Lake Wylie |
| Counties: | Cherokee, York |
| Previous Type: | SC |
| Previous Route: | 53 |
| Next Type: | SC |
| Next Route: | 56 |
South Carolina Highway 55 (SC 55) is a 20.99miles primary state highway in the U.S. state of South Carolina. It connects the city of Clover to Blacksburg, Rock Hill, and Charlotte, North Carolina.
SC 55 is a rural two-lane highway, with a median in and around Clover; between Clover and Lake Wylie, it is also paralleled by a major transmission line. It traverses from SC 5 near Kings Creek, to SC 49/SC 274 near Lake Wylie. Travelers to and from Charlotte would connect through SC 557, just east of Clover.
The first SC 55 appeared in either 1925 or 1926 as a new primary routing from SC 21 near Greenwood, to SC 24 in Friendship. By 1930, it was renumbered as part of SC 24; today it is part of U.S. Route 178 (US 178).
The current SC 55 was established in 1931 as a new primary routing from Kings Creek to Lake Wylie. The highway was fully paved by 1942. In 2012, SC 55 was widened with a median through Clover.[3]