Westminster is located in Carroll county Maryland with a geographic area of 6.6 square miles. The total population in Westminster is 18,649 with 48.4% male and 51.6% female. Children under age 5 represent 5.4% of the population, under age 18 equal 18.4% of the population and over age 65 is 17.5% of the population. The median household income is $64,399, per capita income is $33,404. There are a total of 7,321 housing units with 54.0% owner occupied. Education includes 26.7% of residents that are high school graduates and 33.3% with a bachelor's degree or higher. The average temperature in Westminster in the summer is 74 degrees, and in the winter 37 degrees.