Killingworth is located in Middlesex county Connecticut with a geographic area of square miles. The total population in Killingworth is 6,390 with 48.8% male and 51.2% female. Children under age 5 represent 4.1% of the population, under age 18 equal 19.3% of the population and over age 65 is 20.9% of the population. The median household income is $104,462, per capita income is $48,583. There are a total of 2,353 housing units with 93.8% owner occupied. Education includes 24.1% of residents that are high school graduates and 49.3% with a bachelor's degree or higher. The average temperature in Killingworth in the summer is 68 degrees, and in the winter 27 degrees.
