Billerica is located in Middlesex county Massachusetts with a geographic area of square miles. The total population in Billerica is 43,274 with 50.5% male and 49.5% female. Children under age 5 represent 4.6% of the population, under age 18 equal 18.9% of the population and over age 65 is 15.5% of the population. The median household income is $113,239, per capita income is $44,260. There are a total of 15,499 housing units with 77.6% owner occupied. Education includes 21.9% of residents that are high school graduates and 45.4% with a bachelor's degree or higher. The average temperature in Billerica in the summer is 70 degrees, and in the winter 30 degrees.
