Castle hill is located in Aroostook county Maine with a geographic area of square miles. The total population in Castle hill is 364 with 47.5% male and 52.5% female. Children under age 5 represent 4.4% of the population, under age 18 equal 17.3% of the population and over age 65 is 31.0% of the population. The median household income is $50,455, per capita income is $25,473. There are a total of 160 housing units with 85.6% owner occupied. Education includes 33.1% of residents that are high school graduates and 20.0% with a bachelor's degree or higher. The average temperature in Castle hill in the summer is 68 degrees, and in the winter 25 degrees.
