Arkadelphia is located in Clark county Arkansas with a geographic area of 7.5 square miles. The total population in Arkadelphia is 10,670 with 47.9% male and 52.1% female. Children under age 5 represent 5.6% of the population, under age 18 equal 16.8% of the population and over age 65 is 13.9% of the population. The median household income is $31,643, per capita income is $17,464. There are a total of 3,780 housing units with 39.7% owner occupied. Education includes 28.0% of residents that are high school graduates and 27.9% with a bachelor's degree or higher. The average temperature in Arkadelphia in the summer is 80 degrees, and in the winter 37 degrees.