Alton is located in Penobscot county Maine with a geographic area of square miles. The total population in Alton is 816 with 51.7% male and 48.3% female. Children under age 5 represent 2.5% of the population, under age 18 equal 19.9% of the population and over age 65 is 17.3% of the population. The median household income is $53,365, per capita income is $32,545. There are a total of 345 housing units with 82.3% owner occupied. Education includes 40.9% of residents that are high school graduates and 19.1% with a bachelor's degree or higher. The average temperature in Alton in the summer is 68 degrees, and in the winter 25 degrees.