population hartsville sc
The 2014 Hartsville, South Carolina, population is 7,829. There are 1,368 people per square mile (population density). The median age is 39.7. The US median is 37.2. 40.00% of people in Hartsville, South Carolina, are married. 8.39% are divorced. The average household size is 2.29 people. 20.89% of people are married, with children. 27.57% have children, but are single.