Sterling is located in Windham county Connecticut with a geographic area of square miles. The total population in Sterling is 3,759 with 56.6% male and 43.4% female. Children under age 5 represent 7.3% of the population, under age 18 equal 24.2% of the population and over age 65 is 14.3% of the population. The median household income is $84,643, per capita income is $31,599. There are a total of 1,372 housing units with 76.7% owner occupied. Education includes 33.2% of residents that are high school graduates and 24.3% with a bachelor's degree or higher. The average temperature in Sterling in the summer is 68 degrees, and in the winter 27 degrees.