Middlefield is located in Hampshire county Massachusetts with a geographic area of square miles. The total population in Middlefield is 363 with 52.1% male and 47.9% female. Children under age 5 represent 0.6% of the population, under age 18 equal 5.5% of the population and over age 65 is 23.1% of the population. The median household income is $63,750, per capita income is $46,294. There are a total of 170 housing units with 96.5% owner occupied. Education includes 35.3% of residents that are high school graduates and 23.5% with a bachelor's degree or higher. The average temperature in Middlefield in the summer is 70 degrees, and in the winter 30 degrees.