Christiansburg is located in Montgomery county Virginia with a geographic area of 14.6 square miles. The total population in Christiansburg is 22,482 with 49.7% male and 50.3% female. Children under age 5 represent 5.5% of the population, under age 18 equal 21.1% of the population and over age 65 is 17.0% of the population. The median household income is $63,372, per capita income is $34,622. There are a total of 9,486 housing units with 59.7% owner occupied. Education includes 18.4% of residents that are high school graduates and 46.0% with a bachelor's degree or higher. The average temperature in Christiansburg in the summer is 71 degrees, and in the winter 35 degrees.