South el monte is located in Los angeles county California with a geographic area of 2.8 square miles. The total population in South el monte is 20,791 with 50.8% male and 49.2% female. Children under age 5 represent 7.2% of the population, under age 18 equal 25.1% of the population and over age 65 is 12.8% of the population. The median household income is $54,208, per capita income is $18,311. There are a total of 5,103 housing units with 54.3% owner occupied. Education includes 26.4% of residents that are high school graduates and 10.3% with a bachelor's degree or higher. The average temperature in South el monte in the summer is 76 degrees, and in the winter 43 degrees.