Brimfield is located in Hampden county Massachusetts with a geographic area of square miles. The total population in Brimfield is 3,663 with 51.6% male and 48.4% female. Children under age 5 represent 4.8% of the population, under age 18 equal 21.9% of the population and over age 65 is 20.6% of the population. The median household income is $75,577, per capita income is $42,691. There are a total of 1,494 housing units with 86.7% owner occupied. Education includes 28.7% of residents that are high school graduates and 39.6% with a bachelor's degree or higher. The average temperature in Brimfield in the summer is 70 degrees, and in the winter 30 degrees.