Adelphi is located in Prince george's county Maryland with a geographic area of 2.7 square miles. The total population in Adelphi is 16,364 with 52.3% male and 47.7% female. Children under age 5 represent 7.6% of the population, under age 18 equal 25.6% of the population and over age 65 is 10.8% of the population. The median household income is $68,516, per capita income is $26,440. There are a total of 4,884 housing units with 40.9% owner occupied. Education includes 17.3% of residents that are high school graduates and 36.7% with a bachelor's degree or higher. The average temperature in Adelphi in the summer is 74 degrees, and in the winter 37 degrees.
