Tustin is located in Orange county California with a geographic area of 11.2 square miles. The total population in Tustin is 80,815 with 50.0% male and 50.0% female. Children under age 5 represent 6.9% of the population, under age 18 equal 24.7% of the population and over age 65 is 12.3% of the population. The median household income is $88,386, per capita income is $40,482. There are a total of 26,501 housing units with 49.7% owner occupied. Education includes 13.6% of residents that are high school graduates and 49.3% with a bachelor's degree or higher. The average temperature in Tustin in the summer is 72 degrees, and in the winter 43 degrees.