Castle rock is located in Cowlitz county Washington with a geographic area of 2.1 square miles. The total population in Castle rock is 2,917 with 49.7% male and 50.3% female. Children under age 5 represent 8.5% of the population, under age 18 equal 28.9% of the population and over age 65 is 18.2% of the population. The median household income is $50,700, per capita income is $21,932. There are a total of 1,074 housing units with 65.2% owner occupied. Education includes 36.2% of residents that are high school graduates and 15.2% with a bachelor's degree or higher. The average temperature in Castle rock in the summer is 63 degrees, and in the winter 42 degrees.
