Princeton is located in Washington county Maine with a geographic area of square miles. The total population in Princeton is 654 with 47.6% male and 52.4% female. Children under age 5 represent 8.1% of the population, under age 18 equal 17.1% of the population and over age 65 is 16.2% of the population. The median household income is $46,042, per capita income is $28,762. There are a total of 301 housing units with 81.4% owner occupied. Education includes 32.6% of residents that are high school graduates and 22.9% with a bachelor's degree or higher. The average temperature in Princeton in the summer is 68 degrees, and in the winter 25 degrees.