Westfield is located in Hampden county Massachusetts with a geographic area of 46.3 square miles. The total population in Westfield is 41,303 with 48.3% male and 51.7% female. Children under age 5 represent 3.8% of the population, under age 18 equal 18.9% of the population and over age 65 is 17.5% of the population. The median household income is $74,456, per capita income is $34,726. There are a total of 15,099 housing units with 68.0% owner occupied. Education includes 25.8% of residents that are high school graduates and 35.3% with a bachelor's degree or higher. The average temperature in Westfield in the summer is 70 degrees, and in the winter 30 degrees.