Rockville is located in Montgomery county Maryland with a geographic area of 13.6 square miles. The total population in Rockville is 68,155 with 47.0% male and 53.0% female. Children under age 5 represent 6.1% of the population, under age 18 equal 21.2% of the population and over age 65 is 17.7% of the population. The median household income is $111,797, per capita income is $54,611. There are a total of 26,439 housing units with 54.9% owner occupied. Education includes 7.2% of residents that are high school graduates and 70.4% with a bachelor's degree or higher. The average temperature in Rockville in the summer is 73 degrees, and in the winter 37 degrees.