Charleston is located in Mississippi county Missouri with a geographic area of 4.8 square miles. The total population in Charleston is 5,478 with 62.0% male and 38.0% female. Children under age 5 represent 2.7% of the population, under age 18 equal 18.9% of the population and over age 65 is 14.3% of the population. The median household income is $30,761, per capita income is $13,144. There are a total of 1,603 housing units with 54.5% owner occupied. Education includes 45.1% of residents that are high school graduates and 14.4% with a bachelor's degree or higher. The average temperature in Charleston in the summer is 78 degrees, and in the winter 32 degrees.