San carlos is located in Gila county Arizona with a geographic area of 8.6 square miles. The total population in San carlos is 4,555 with 47.4% male and 52.6% female. Children under age 5 represent 10.8% of the population, under age 18 equal 35.9% of the population and over age 65 is 8.3% of the population. The median household income is $33,661, per capita income is $10,429. There are a total of 1,103 housing units with 52.8% owner occupied. Education includes 35.8% of residents that are high school graduates and 5.5% with a bachelor's degree or higher. The average temperature in San carlos in the summer is 83 degrees, and in the winter 49 degrees.