Antioch is located in Contra costa county California with a geographic area of 29.2 square miles. The total population in Antioch is 111,468 with 47.7% male and 52.3% female. Children under age 5 represent 5.7% of the population, under age 18 equal 24.2% of the population and over age 65 is 12.7% of the population. The median household income is $80,234, per capita income is $30,526. There are a total of 33,803 housing units with 61.4% owner occupied. Education includes 22.0% of residents that are high school graduates and 22.9% with a bachelor's degree or higher. The average temperature in Antioch in the summer is 73 degrees, and in the winter 43 degrees.
