Santee is located in San diego county California with a geographic area of 16.5 square miles. The total population in Santee is 57,407 with 47.9% male and 52.1% female. Children under age 5 represent 6.5% of the population, under age 18 equal 22.5% of the population and over age 65 is 15.3% of the population. The median household income is $85,826, per capita income is $35,236. There are a total of 19,450 housing units with 71.4% owner occupied. Education includes 20.0% of residents that are high school graduates and 33.0% with a bachelor's degree or higher. The average temperature in Santee in the summer is 74 degrees, and in the winter 43 degrees.