Mullins is a city in Marion County, South Carolina, in the United States. As of the 2000 census, the city population was 5,029. Incorporated on March 4, 1872, Mullins was named after Col. William S. Mullins, who served as a representative for Marion County in the South Carolina State Legislature from 1852 to 1866.
Mullins is located at 34°12′19″N 79°15′19″W / 34.20528°N 79.25528°W / 34.20528; -79.25528 (34.205239, -79.255309).
According to the United States Census Bureau, the city has a total area of 3.0 square miles (7.9 km²), all of it land.