Colchester is located in Chittenden county Vermont with a geographic area of square miles. The total population in Colchester is 17,256 with 51.6% male and 48.4% female. Children under age 5 represent 4.9% of the population, under age 18 equal 17.3% of the population and over age 65 is 12.4% of the population. The median household income is $79,172, per capita income is $36,940. There are a total of 6,669 housing units with 70.4% owner occupied. Education includes 20.8% of residents that are high school graduates and 48.6% with a bachelor's degree or higher. The average temperature in Colchester in the summer is 65 degrees, and in the winter 19 degrees.