Vassalboro is located in Kennebec county Maine with a geographic area of square miles. The total population in Vassalboro is 4,371 with 51.8% male and 48.2% female. Children under age 5 represent 4.5% of the population, under age 18 equal 16.7% of the population and over age 65 is 23.2% of the population. The median household income is $65,949, per capita income is $34,892. There are a total of 1,978 housing units with 79.4% owner occupied. Education includes 25.5% of residents that are high school graduates and 32.2% with a bachelor's degree or higher. The average temperature in Vassalboro in the summer is 68 degrees, and in the winter 25 degrees.