Altadena is located in Los angeles county California with a geographic area of 8.5 square miles. The total population in Altadena is 43,037 with 46.9% male and 53.1% female. Children under age 5 represent 5.2% of the population, under age 18 equal 19.3% of the population and over age 65 is 20.0% of the population. The median household income is $100,806, per capita income is $50,223. There are a total of 15,019 housing units with 70.7% owner occupied. Education includes 13.0% of residents that are high school graduates and 54.4% with a bachelor's degree or higher. The average temperature in Altadena in the summer is 76 degrees, and in the winter 43 degrees.