Plum Branch is a town in McCormick County, South Carolina, United States. As of the 2020 census, Plum Branch had a population of 72.

Geography

According to the United States Census Bureau, the town has a total area of , all land.

Demographics

As of the 2010 Census, the population was 82, 59 (71.95%) were White, 20 (24.39%) were Black or African American, and 3 (3.66%) were two or more races. None were Hispanic or Latino (of any race)

At the 2000 census there were 98 people, 43 households, and 26 families living in the town. The population density was . There were 52 housing units at an average density of . The racial makeup of the town was 78.57% White and 21.43% African American.