Elkridge is located in Howard county Maryland with a geographic area of 8.4 square miles. The total population in Elkridge is 21,778 with 45.7% male and 54.3% female. Children under age 5 represent 8.6% of the population, under age 18 equal 27.1% of the population and over age 65 is 7.2% of the population. The median household income is $108,627, per capita income is $45,744. There are a total of 7,977 housing units with 64.9% owner occupied. Education includes 13.0% of residents that are high school graduates and 56.6% with a bachelor's degree or higher. The average temperature in Elkridge in the summer is 74 degrees, and in the winter 37 degrees.