Catonsville is located in Baltimore county Maryland with a geographic area of 14.0 square miles. The total population in Catonsville is 41,592 with 48.7% male and 51.3% female. Children under age 5 represent 5.3% of the population, under age 18 equal 21.4% of the population and over age 65 is 19.9% of the population. The median household income is $91,539, per capita income is $42,147. There are a total of 15,566 housing units with 70.7% owner occupied. Education includes 16.1% of residents that are high school graduates and 54.9% with a bachelor's degree or higher. The average temperature in Catonsville in the summer is 74 degrees, and in the winter 37 degrees.