Monroe is located in Fairfield county Connecticut with a geographic area of square miles. The total population in Monroe is 19,492 with 50.7% male and 49.3% female. Children under age 5 represent 6.6% of the population, under age 18 equal 25.0% of the population and over age 65 is 14.9% of the population. The median household income is $121,847, per capita income is $51,001. There are a total of 6,653 housing units with 89.7% owner occupied. Education includes 23.1% of residents that are high school graduates and 52.4% with a bachelor's degree or higher. The average temperature in Monroe in the summer is 68 degrees, and in the winter 27 degrees.