Greenville is located in New castle county Delaware with a geographic area of 2.8 square miles. The total population in Greenville is 2,448 with 49.4% male and 50.6% female. Children under age 5 represent 5.6% of the population, under age 18 equal 20.7% of the population and over age 65 is 22.5% of the population. The median household income is $117,759, per capita income is $94,483. There are a total of 1,124 housing units with 49.5% owner occupied. Education includes 3.8% of residents that are high school graduates and 82.0% with a bachelor's degree or higher. The average temperature in Greenville in the summer is 74 degrees, and in the winter 35 degrees.