Colchester is located in New london county Connecticut with a geographic area of 4.5 square miles. The total population in Colchester is 5,147 with 48.5% male and 51.5% female. Children under age 5 represent 8.5% of the population, under age 18 equal 21.0% of the population and over age 65 is 24.2% of the population. The median household income is $66,180, per capita income is $34,754. There are a total of 2,237 housing units with 57.2% owner occupied. Education includes 20.6% of residents that are high school graduates and 34.8% with a bachelor's degree or higher. The average temperature in Colchester in the summer is 68 degrees, and in the winter 27 degrees.
