Marblehead is located in Essex county Massachusetts with a geographic area of 4.4 square miles. The total population in Marblehead is 20,530 with 45.7% male and 54.3% female. Children under age 5 represent 3.5% of the population, under age 18 equal 23.0% of the population and over age 65 is 21.4% of the population. The median household income is $131,293, per capita income is $74,357. There are a total of 8,126 housing units with 79.0% owner occupied. Education includes 8.8% of residents that are high school graduates and 74.3% with a bachelor's degree or higher. The average temperature in Marblehead in the summer is 70 degrees, and in the winter 30 degrees.
