Granville is located in Hampden county Massachusetts with a geographic area of square miles. The total population in Granville is 1,703 with 50.1% male and 49.9% female. Children under age 5 represent 4.7% of the population, under age 18 equal 19.4% of the population and over age 65 is 16.1% of the population. The median household income is $91,071, per capita income is $38,983. There are a total of 644 housing units with 96.6% owner occupied. Education includes 26.1% of residents that are high school graduates and 39.8% with a bachelor's degree or higher. The average temperature in Granville in the summer is 70 degrees, and in the winter 30 degrees.