Gilroy is located in Santa clara county California with a geographic area of 16.5 square miles. The total population in Gilroy is 55,227 with 48.5% male and 51.5% female. Children under age 5 represent 6.7% of the population, under age 18 equal 28.6% of the population and over age 65 is 11.8% of the population. The median household income is $107,729, per capita income is $38,449. There are a total of 15,677 housing units with 63.6% owner occupied. Education includes 17.5% of residents that are high school graduates and 35.0% with a bachelor's degree or higher. The average temperature in Gilroy in the summer is 71 degrees, and in the winter 43 degrees.