Harleyville is located in Dorchester county South carolina with a geographic area of 1.1 square miles. The total population in Harleyville is 658 with 43.9% male and 56.1% female. Children under age 5 represent 7.9% of the population, under age 18 equal 28.7% of the population and over age 65 is 17.9% of the population. The median household income is $39,063, per capita income is $18,566. There are a total of 245 housing units with 66.1% owner occupied. Education includes 42.4% of residents that are high school graduates and 10.6% with a bachelor's degree or higher. The average temperature in Harleyville in the summer is 77 degrees, and in the winter 43 degrees.