South bethany is located in Sussex county Delaware with a geographic area of 0.5 square miles. The total population in South bethany is 558 with 62.0% male and 38.0% female. Children under age 5 represent 0.0% of the population, under age 18 equal 0.5% of the population and over age 65 is 73.1% of the population. The median household income is $94,025, per capita income is $81,388. There are a total of 384 housing units with 99.5% owner occupied. Education includes 4.4% of residents that are high school graduates and 81.3% with a bachelor's degree or higher. The average temperature in South bethany in the summer is 74 degrees, and in the winter 35 degrees.