Fenwick island is located in Sussex county Delaware with a geographic area of 0.3 square miles. The total population in Fenwick island is 445 with 47.9% male and 52.1% female. Children under age 5 represent 0.7% of the population, under age 18 equal 8.1% of the population and over age 65 is 55.1% of the population. The median household income is $85,000, per capita income is $72,396. There are a total of 228 housing units with 95.2% owner occupied. Education includes 17.1% of residents that are high school graduates and 49.1% with a bachelor's degree or higher. The average temperature in Fenwick island in the summer is 74 degrees, and in the winter 35 degrees.