Seaford is located in Sussex county Delaware with a geographic area of 5.1 square miles. The total population in Seaford is 7,897 with 45.5% male and 54.5% female. Children under age 5 represent 7.1% of the population, under age 18 equal 24.2% of the population and over age 65 is 17.9% of the population. The median household income is $52,840, per capita income is $24,204. There are a total of 3,008 housing units with 51.1% owner occupied. Education includes 37.3% of residents that are high school graduates and 14.6% with a bachelor's degree or higher. The average temperature in Seaford in the summer is 74 degrees, and in the winter 35 degrees.