Mendon is located in Worcester county Massachusetts with a geographic area of square miles. The total population in Mendon is 6,146 with 50.1% male and 49.9% female. Children under age 5 represent 4.1% of the population, under age 18 equal 23.6% of the population and over age 65 is 16.2% of the population. The median household income is $126,806, per capita income is $49,911. There are a total of 2,059 housing units with 92.1% owner occupied. Education includes 16.8% of residents that are high school graduates and 56.5% with a bachelor's degree or higher. The average temperature in Mendon in the summer is 70 degrees, and in the winter 30 degrees.