Charleston is located in Charleston county South carolina with a geographic area of 114.8 square miles. The total population in Charleston is 137,041 with 46.9% male and 53.1% female. Children under age 5 represent 5.7% of the population, under age 18 equal 16.5% of the population and over age 65 is 15.4% of the population. The median household income is $72,071, per capita income is $46,575. There are a total of 57,226 housing units with 55.4% owner occupied. Education includes 16.2% of residents that are high school graduates and 56.7% with a bachelor's degree or higher. The average temperature in Charleston in the summer is 81 degrees, and in the winter 43 degrees.