San diego is located in Duval county Texas with a geographic area of 1.9 square miles. The total population in San diego is 4,062 with 54.5% male and 45.5% female. Children under age 5 represent 5.7% of the population, under age 18 equal 30.3% of the population and over age 65 is 14.8% of the population. The median household income is $32,165, per capita income is $19,352. There are a total of 1,390 housing units with 73.4% owner occupied. Education includes 23.3% of residents that are high school graduates and 7.6% with a bachelor's degree or higher. The average temperature in San diego in the summer is 84 degrees, and in the winter 49 degrees.
