Castle pines is located in Douglas county Colorado with a geographic area of 9.6 square miles. The total population in Castle pines is 10,977 with 50.4% male and 49.6% female. Children under age 5 represent 4.5% of the population, under age 18 equal 26.1% of the population and over age 65 is 14.3% of the population. The median household income is $178,036, per capita income is $64,910. There are a total of 3,540 housing units with 88.7% owner occupied. Education includes 2.4% of residents that are high school graduates and 79.2% with a bachelor's degree or higher. The average temperature in Castle pines in the summer is 68 degrees, and in the winter 29 degrees.