Sussex is located in Sussex county New jersey with a geographic area of 0.6 square miles. The total population in Sussex is 1,836 with 49.6% male and 50.4% female. Children under age 5 represent 6.0% of the population, under age 18 equal 15.4% of the population and over age 65 is 15.3% of the population. The median household income is $58,309, per capita income is $34,529. There are a total of 779 housing units with 44.5% owner occupied. Education includes 41.5% of residents that are high school graduates and 22.0% with a bachelor's degree or higher. The average temperature in Sussex in the summer is 73 degrees, and in the winter 34 degrees.