Mount pleasant is located in Charleston county South carolina with a geographic area of 49.5 square miles. The total population in Mount pleasant is 89,410 with 49.3% male and 50.7% female. Children under age 5 represent 5.4% of the population, under age 18 equal 22.9% of the population and over age 65 is 16.7% of the population. The median household income is $104,772, per capita income is $58,409. There are a total of 36,407 housing units with 71.8% owner occupied. Education includes 8.3% of residents that are high school graduates and 70.2% with a bachelor's degree or higher. The average temperature in Mount pleasant in the summer is 77 degrees, and in the winter 43 degrees.