Chelsea is located in Suffolk county Massachusetts with a geographic area of 2.2 square miles. The total population in Chelsea is 39,878 with 50.8% male and 49.2% female. Children under age 5 represent 8.0% of the population, under age 18 equal 24.5% of the population and over age 65 is 9.7% of the population. The median household income is $60,370, per capita income is $26,203. There are a total of 13,174 housing units with 26.9% owner occupied. Education includes 27.8% of residents that are high school graduates and 25.8% with a bachelor's degree or higher. The average temperature in Chelsea in the summer is 71 degrees, and in the winter 30 degrees.
