Picayune is located in Pearl river county Mississippi with a geographic area of 18.0 square miles. The total population in Picayune is 11,016 with 44.4% male and 55.6% female. Children under age 5 represent 6.6% of the population, under age 18 equal 25.4% of the population and over age 65 is 19.1% of the population. The median household income is $31,349, per capita income is $20,038. There are a total of 4,637 housing units with 60.2% owner occupied. Education includes 29.4% of residents that are high school graduates and 14.0% with a bachelor's degree or higher. The average temperature in Picayune in the summer is 81 degrees, and in the winter 44 degrees.