Newcastle is located in Lincoln county Maine with a geographic area of 2.2 square miles. The total population in Newcastle is 643 with 56.8% male and 43.2% female. Children under age 5 represent 0.6% of the population, under age 18 equal 8.7% of the population and over age 65 is 30.3% of the population. The median household income is $99,375, per capita income is $49,330. There are a total of 300 housing units with 73.0% owner occupied. Education includes 43.7% of residents that are high school graduates and 50.3% with a bachelor's degree or higher. The average temperature in Newcastle in the summer is 68 degrees, and in the winter 25 degrees.
