Newcastle is located in Mcclain county Oklahoma with a geographic area of 60.1 square miles. The total population in Newcastle is 10,425 with 49.1% male and 50.9% female. Children under age 5 represent 5.9% of the population, under age 18 equal 24.7% of the population and over age 65 is 12.8% of the population. The median household income is $86,065, per capita income is $44,497. There are a total of 4,002 housing units with 85.7% owner occupied. Education includes 27.2% of residents that are high school graduates and 31.2% with a bachelor's degree or higher. The average temperature in Newcastle in the summer is 81 degrees, and in the winter 42 degrees.