Castlewood is located in Russell county Virginia with a geographic area of 7.2 square miles. The total population in Castlewood is 1,315 with 51.0% male and 49.0% female. Children under age 5 represent 6.2% of the population, under age 18 equal 18.5% of the population and over age 65 is 21.4% of the population. The median household income is $43,871, per capita income is $23,321. There are a total of 580 housing units with 66.6% owner occupied. Education includes 34.1% of residents that are high school graduates and 4.0% with a bachelor's degree or higher. The average temperature in Castlewood in the summer is 71 degrees, and in the winter 35 degrees.