Thompson is located in Windham county Connecticut with a geographic area of square miles. The total population in Thompson is 9,361 with 48.1% male and 51.9% female. Children under age 5 represent 4.9% of the population, under age 18 equal 17.4% of the population and over age 65 is 18.0% of the population. The median household income is $75,168, per capita income is $35,800. There are a total of 3,826 housing units with 77.9% owner occupied. Education includes 35.2% of residents that are high school graduates and 22.4% with a bachelor's degree or higher. The average temperature in Thompson in the summer is 68 degrees, and in the winter 27 degrees.