Old lyme is located in New london county Connecticut with a geographic area of square miles. The total population in Old lyme is 7,371 with 50.0% male and 50.0% female. Children under age 5 represent 3.0% of the population, under age 18 equal 19.0% of the population and over age 65 is 26.5% of the population. The median household income is $105,417, per capita income is $72,875. There are a total of 3,162 housing units with 81.5% owner occupied. Education includes 12.3% of residents that are high school graduates and 59.8% with a bachelor's degree or higher. The average temperature in Old lyme in the summer is 68 degrees, and in the winter 27 degrees.
