The total population of Plum Branch is estimated to be 76 with 43 males (56.58%) and 33 females (43.42%). There are 10 less females than males in Plum Branch.
In 2022, the population of Plum Branch was 74, a 1.37% increase year-by-year from 2021. Previously, in 2021, Plum Branch's population was 73, an increase of 2.82% compared to a population of 71 in 2020.
The median age in Plum Branch, SC is 47.0, as per 2021 ACS 5-Year Estimates. Of the total population, 5.95% were under the age of 15, 28.57% aged 15 to 29, 50.00% aged 30 to 64, 15.48% aged 65 to 84, and 0.00% were 85 years of age and older.