Andover is located in Tolland county Connecticut with a geographic area of square miles. The total population in Andover is 3,178 with 47.5% male and 52.5% female. Children under age 5 represent 4.7% of the population, under age 18 equal 16.2% of the population and over age 65 is 16.6% of the population. The median household income is $99,449, per capita income is $44,803. There are a total of 1,203 housing units with 86.4% owner occupied. Education includes 22.0% of residents that are high school graduates and 43.4% with a bachelor's degree or higher. The average temperature in Andover in the summer is 68 degrees, and in the winter 27 degrees.