San clemente is located in Orange county California with a geographic area of 18.4 square miles. The total population in San clemente is 64,929 with 49.7% male and 50.3% female. Children under age 5 represent 4.9% of the population, under age 18 equal 22.6% of the population and over age 65 is 18.8% of the population. The median household income is $108,183, per capita income is $59,167. There are a total of 24,388 housing units with 65.7% owner occupied. Education includes 10.6% of residents that are high school graduates and 52.9% with a bachelor's degree or higher. The average temperature in San clemente in the summer is 68 degrees, and in the winter 43 degrees.